[recipes] Use named caches for git and workdirs

Bug: skia: Change-Id: Iaf3d190252c9483c8b9e58a3ab0305db4173cc1c Reviewed-on: https://skia-review.googlesource.com/123929 Commit-Queue: Eric Boren <borenet@google.com> Reviewed-by: Ben Wagner <benjaminwagner@google.com>
author: Eric Boren <borenet@google.com> 2018-04-26 14:23:08 -0400
committer: Skia Commit-Bot <skia-commit-bot@chromium.org> 2018-04-26 18:51:13 +0000
commit: e8615f969e92009551b70c85d1913202390e0b0d (patch)
tree: cdabbd4f78be6bbed4dfe6774d13b7e8f93abcc7 /infra/bots/recipes/ct_skps.expected
parent: 329694260c6d40ea3ef8fff45d67bbc5a35b1276 (diff)
12 files changed, 468 insertions, 468 deletions
diff --git a/infra/bots/recipes/ct_skps.expected/CT_CPU_BENCH_10k_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_CPU_BENCH_10k_SKPs.json
index 551554f81e..5e53becd75 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_CPU_BENCH_10k_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_CPU_BENCH_10k_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Release",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"] is_debug=false"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Release",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_DM_100k_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_DM_100k_SKPs.json
index de43f2dba3..af0c9d55d5 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_DM_100k_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_DM_100k_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs.json
index b13bee0509..7a37ccad26 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs_Trybot.json b/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs_Trybot.json
index 27a865201e..39161cded8 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs_Trybot.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_DM_10k_SKPs_Trybot.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--gerrit_repo",
@@ -51,7 +51,7 @@
       "--revision",
       "skia@origin/master"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -120,7 +120,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -130,9 +130,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -144,12 +144,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -166,7 +166,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -181,7 +181,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -322,7 +322,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -338,7 +338,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -354,7 +354,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -382,7 +382,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -413,7 +413,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -428,7 +428,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -448,7 +448,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -475,7 +475,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -489,7 +489,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -504,7 +504,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -524,7 +524,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -551,7 +551,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -565,7 +565,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -580,7 +580,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -600,7 +600,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -627,7 +627,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -641,7 +641,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -656,7 +656,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -676,7 +676,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -703,7 +703,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -717,7 +717,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -732,7 +732,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -752,7 +752,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -779,7 +779,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -794,10 +794,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs.json
index ec2d97d55d..73971f8f20 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_2slaves_failure.json b/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_2slaves_failure.json
index 03368f5213..fe21bc7602 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_2slaves_failure.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_2slaves_failure.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_slave3_failure.json b/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_slave3_failure.json
index 6104882393..ab5d017882 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_slave3_failure.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_DM_1m_SKPs_slave3_failure.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-dm-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_DM_1m_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"dm\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-dm-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_10k_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_10k_SKPs.json
index 651ff14872..326c4c8a87 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_10k_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_10k_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Release",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"] is_debug=false"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Release",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_1k_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_1k_SKPs.json
index 34d114203a..4873519fcd 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_1k_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_GPU_BENCH_1k_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Release",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"] is_debug=false"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Release",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-nanobench-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Release\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Perf-Ubuntu14-Clang-Golo-GPU-QuadroP400-x86_64-Release-All-CT_BENCH_1k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"nanobench\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-nanobench-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_100k_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_100k_SKPs.json
index a1c287dc39..c05cbef8d3 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_100k_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_100k_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_100k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs.json b/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs.json
index 288767f981..cca63c9860 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -116,7 +116,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -126,9 +126,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -140,12 +140,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -162,7 +162,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -177,7 +177,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -318,7 +318,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -334,7 +334,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -350,7 +350,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -378,7 +378,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -409,7 +409,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -424,7 +424,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -444,7 +444,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -471,7 +471,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -485,7 +485,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -500,7 +500,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -520,7 +520,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -547,7 +547,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -561,7 +561,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -576,7 +576,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -596,7 +596,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -623,7 +623,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -637,7 +637,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -652,7 +652,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -672,7 +672,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -699,7 +699,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -713,7 +713,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -728,7 +728,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -748,7 +748,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -775,7 +775,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -790,10 +790,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
diff --git a/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs_Trybot.json b/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs_Trybot.json
index d2031fdc30..ba92295670 100644
--- a/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs_Trybot.json
+++ b/infra/bots/recipes/ct_skps.expected/CT_IMG_DECODE_10k_SKPs_Trybot.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]"
+      "[START_DIR]/cache/work"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/.gclient_entries"
   },
   {
     "cmd": [
@@ -33,13 +33,13 @@
       "-u",
       "RECIPE_MODULE[depot_tools::bot_update]/resources/bot_update.py",
       "--spec-path",
-      "cache_dir = '[CUSTOM_/_B_CACHE]'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--gerrit_repo",
@@ -51,7 +51,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -120,7 +120,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/clang_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -130,9 +130,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -144,12 +144,12 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_cflags=[\"-B[START_DIR]/clang_linux/bin\", \"-DDUMMY_clang_linux_version=42\", \"-O1\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-static-libstdc++\", \"-static-libgcc\"]"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -166,7 +166,7 @@
       "-C",
       "[START_DIR]/build/out/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
@@ -181,7 +181,7 @@
       "-u",
       "import errno\nimport glob\nimport os\nimport shutil\nimport sys\n\nsrc = sys.argv[1]\ndst = sys.argv[2]\nbuild_products_whitelist = ['bookmaker', 'dm', 'dm.exe', 'dm.app', 'nanobench.app', 'get_images_from_skps', 'get_images_from_skps.exe', 'nanobench', 'nanobench.exe', 'skpbench', '*.so', '*.dll', '*.dylib', 'skia_launcher', 'skiaserve', 'lib/*.so', 'run_testlab', 'skqp-universal-debug.apk', 'whitelist_devices.json']\n\ntry:\n  os.makedirs(dst)\nexcept OSError as e:\n  if e.errno != errno.EEXIST:\n    raise\n\nfor pattern in build_products_whitelist:\n  path = os.path.join(src, pattern)\n  for f in glob.glob(path):\n    dst_path = os.path.join(dst, os.path.relpath(f, src))\n    if not os.path.isdir(os.path.dirname(dst_path)):\n      os.makedirs(os.path.dirname(dst_path))\n    print 'Copying build product %s to %s' % (f, dst_path)\n    shutil.move(f, dst_path)\n",
       "[START_DIR]/build/out/Debug",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/ct"
+      "[START_DIR]/cache/work/skia/infra/bots/ct"
     ],
     "infra_step": true,
     "name": "copy build products",
@@ -322,7 +322,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/linux64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/linux64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -338,7 +338,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/mac64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/mac64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -354,7 +354,7 @@
       "--bucket",
       "chromium-luci",
       "-d",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go/win64"
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go/win64"
     ],
     "env": {
       "PATH": "RECIPE_PACKAGE_REPO[depot_tools]:<PATH>"
@@ -382,7 +382,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copytree",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/tools/luci-go",
+      "[START_DIR]/cache/work/skia/infra/bots/tools/luci-go",
       "[START_DIR]/luci-go"
     ],
     "infra_step": true,
@@ -413,7 +413,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "rmtree slave1"
@@ -428,7 +428,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "infra_step": true,
     "name": "makedirs slave1"
@@ -448,7 +448,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/8/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/9/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/10/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave1"
     ],
     "name": "gsutil cp"
   },
@@ -475,7 +475,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-1.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"1\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-1.isolated.gen.json"
     ],
     "infra_step": true,
@@ -489,7 +489,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "rmtree slave2"
@@ -504,7 +504,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "infra_step": true,
     "name": "makedirs slave2"
@@ -524,7 +524,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/18/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/19/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/20/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave2"
     ],
     "name": "gsutil cp (2)"
   },
@@ -551,7 +551,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-2.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"2\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-2.isolated.gen.json"
     ],
     "infra_step": true,
@@ -565,7 +565,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "rmtree slave3"
@@ -580,7 +580,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "infra_step": true,
     "name": "makedirs slave3"
@@ -600,7 +600,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/28/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/29/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/30/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave3"
     ],
     "name": "gsutil cp (3)"
   },
@@ -627,7 +627,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-3.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"3\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-3.isolated.gen.json"
     ],
     "infra_step": true,
@@ -641,7 +641,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "rmtree slave4"
@@ -656,7 +656,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "infra_step": true,
     "name": "makedirs slave4"
@@ -676,7 +676,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/38/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/39/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/40/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave4"
     ],
     "name": "gsutil cp (4)"
   },
@@ -703,7 +703,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-4.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"4\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-4.isolated.gen.json"
     ],
     "infra_step": true,
@@ -717,7 +717,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "rmtree slave5"
@@ -732,7 +732,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "infra_step": true,
     "name": "makedirs slave5"
@@ -752,7 +752,7 @@
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/48/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/49/*.skp",
       "gs://cluster-telemetry/swarming/skps/All/2b7e85eb251dc7-a3cf3659ed2c08/50/*.skp",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/slave5"
     ],
     "name": "gsutil cp (5)"
   },
@@ -779,7 +779,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "{\n    \"args\": [\n        \"--isolate\", \n        \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[CUSTOM_/_B_WORK]/skia/infra/bots/ct\", \n    \"version\": 1\n}",
+      "{\n    \"args\": [\n        \"--isolate\", \n        \"[START_DIR]/cache/work/skia/infra/bots/ct/ct_skps.isolate\", \n        \"--isolated\", \n        \"[START_DIR]/swarming_temp_dir/skia-task-ct-get_images_from_skps-5.isolated\", \n        \"--config-variable\", \n        \"OS\", \n        \"linux\", \n        \"--extra-variable\", \n        \"NUM_SLAVES\", \n        \"5\", \n        \"--extra-variable\", \n        \"CONFIGURATION\", \n        \"Debug\", \n        \"--extra-variable\", \n        \"SLAVE_NUM\", \n        \"5\", \n        \"--extra-variable\", \n        \"PAGE_TYPE\", \n        \"All\", \n        \"--extra-variable\", \n        \"BUILDER\", \n        \"Test-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Debug-All-CT_IMG_DECODE_10k_SKPs\", \n        \"--extra-variable\", \n        \"GIT_HASH\", \n        \"9046e2e693bb92a76e972b694580e5d17ad10748\", \n        \"--extra-variable\", \n        \"TOOL_NAME\", \n        \"get_images_from_skps\", \n        \"--extra-variable\", \n        \"CHROMIUM_BUILD\", \n        \"2b7e85eb251dc7-a3cf3659ed2c08\"\n    ], \n    \"dir\": \"[START_DIR]/cache/work/skia/infra/bots/ct\", \n    \"version\": 1\n}",
       "[START_DIR]/swarming_temp_dir/ct-get_images_from_skps-5.isolated.gen.json"
     ],
     "infra_step": true,
@@ -794,10 +794,10 @@
       "/path/to/tmp/json",
       "copy",
       "{\"chromium_build\": \"2b7e85eb251dc7-a3cf3659ed2c08\", \"num_slaves\": 5, \"page_type\": \"All\"}",
-      "[CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+      "[START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
     ],
     "infra_step": true,
-    "name": "Create [CUSTOM_/_B_WORK]/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
+    "name": "Create [START_DIR]/cache/work/skps/2b7e85eb251dc7-a3cf3659ed2c08/All/5/skps_version"
   },
   {
     "cmd": [
author	Eric Boren <borenet@google.com>	2018-04-26 14:23:08 -0400
committer	Skia Commit-Bot <skia-commit-bot@chromium.org>	2018-04-26 18:51:13 +0000
commit	e8615f969e92009551b70c85d1913202390e0b0d (patch)
tree	cdabbd4f78be6bbed4dfe6774d13b7e8f93abcc7 /infra/bots/recipes/ct_skps.expected
parent	329694260c6d40ea3ef8fff45d67bbc5a35b1276 (diff)