[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>

41 files changed, 420 insertions, 429 deletions

diff --git a/infra/bots/recipe_modules/core/examples/full.expected/Housekeeper-Weekly-RecreateSKPs.json b/infra/bots/recipe_modules/core/examples/full.expected/Housekeeper-Weekly-RecreateSKPs.json
index a2967213c3..cf2c43fcb2 100644
--- a/infra/bots/recipe_modules/core/examples/full.expected/Housekeeper-Weekly-RecreateSKPs.json
+++ b/infra/bots/recipe_modules/core/examples/full.expected/Housekeeper-Weekly-RecreateSKPs.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'}, {'deps_file': '.DEPS.git', 'managed': False, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'skia', 'url': 'https://skia.googlesource.com/skia.git'}, {'deps_file': '.DEPS.git', 'managed': False, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.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",
@@ -49,7 +49,7 @@
       "--revision",
       "src@origin/lkcr"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
@@ -103,7 +103,7 @@
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env": {
       "CPPFLAGS": "-DSK_ALLOW_CROSSPROCESS_PICTUREIMAGEFILTERS=1",
       "DEPOT_TOOLS_UPDATE": "0",
diff --git a/infra/bots/recipe_modules/core/examples/full.expected/cross_repo_trybot.json b/infra/bots/recipe_modules/core/examples/full.expected/cross_repo_trybot.json
index af1d2a63b8..4399b6cde2 100644
--- a/infra/bots/recipe_modules/core/examples/full.expected/cross_repo_trybot.json
+++ b/infra/bots/recipe_modules/core/examples/full.expected/cross_repo_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': 'parent_repo', 'url': 'https://skia.googlesource.com/parent_repo.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': False, 'name': 'parent_repo', 'url': 'https://skia.googlesource.com/parent_repo.git'}]",
       "--patch_root",
       "skia",
       "--revision_mapping_file",
       "{\"got_revision\": \"parent_repo\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--gerrit_repo",
@@ -51,7 +51,7 @@
       "--revision",
       "parent_repo@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
diff --git a/infra/bots/recipe_modules/core/examples/full.expected/flutter_trybot.json b/infra/bots/recipe_modules/core/examples/full.expected/flutter_trybot.json
index b41ff52e47..c73455d175 100644
--- a/infra/bots/recipe_modules/core/examples/full.expected/flutter_trybot.json
+++ b/infra/bots/recipe_modules/core/examples/full.expected/flutter_trybot.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/flutter"
+      "[START_DIR]/cache/work/flutter"
     ],
     "infra_step": true,
     "name": "makedirs checkout_path"
@@ -22,10 +22,10 @@
       "--json-output",
       "/path/to/tmp/json",
       "remove",
-      "[CUSTOM_/_B_WORK]/flutter/.gclient_entries"
+      "[START_DIR]/cache/work/flutter/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_/_B_WORK]/flutter/.gclient_entries"
+    "name": "remove [START_DIR]/cache/work/flutter/.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': True, 'name': 'src/flutter', 'url': 'https://github.com/flutter/engine.git'}]\ntarget_os = ['android']",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': True, 'name': 'src/flutter', 'url': 'https://github.com/flutter/engine.git'}]\ntarget_os = ['android']",
       "--patch_root",
       "src/third_party/skia",
       "--revision_mapping_file",
       "{\"got_flutter_revision\": \"src/flutter\", \"got_revision\": \"src/third_party/skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--gerrit_repo",
@@ -53,7 +53,7 @@
       "--revision",
       "src/third_party/skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/flutter",
+    "cwd": "[START_DIR]/cache/work/flutter",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
diff --git a/infra/bots/recipe_modules/core/examples/full.expected/parent_revision.json b/infra/bots/recipe_modules/core/examples/full.expected/parent_revision.json
index 162d5d2f2b..ffce3b2ee9 100644
--- a/infra/bots/recipe_modules/core/examples/full.expected/parent_revision.json
+++ b/infra/bots/recipe_modules/core/examples/full.expected/parent_revision.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_C:\\_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_C:\\_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_C:\\_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_C:\\\\_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_C:\\_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123^"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
diff --git a/infra/bots/recipe_modules/core/examples/full.expected/parent_revision_trybot.json b/infra/bots/recipe_modules/core/examples/full.expected/parent_revision_trybot.json
index 8be1f734d4..2a1eb4cb64 100644
--- a/infra/bots/recipe_modules/core/examples/full.expected/parent_revision_trybot.json
+++ b/infra/bots/recipe_modules/core/examples/full.expected/parent_revision_trybot.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_C:\\_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_C:\\_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_C:\\_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_C:\\\\_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_C:\\_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--output_json",
@@ -47,7 +47,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
diff --git a/infra/bots/recipe_modules/core/examples/full.expected/pdfium_trybot.json b/infra/bots/recipe_modules/core/examples/full.expected/pdfium_trybot.json
index 03aed27295..fe3983f59c 100644
--- a/infra/bots/recipe_modules/core/examples/full.expected/pdfium_trybot.json
+++ b/infra/bots/recipe_modules/core/examples/full.expected/pdfium_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': True, 'name': 'pdfium', 'url': 'https://pdfium.googlesource.com/pdfium.git'}]",
+      "cache_dir = '[START_DIR]/cache/git'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': True, 'name': 'pdfium', 'url': 'https://pdfium.googlesource.com/pdfium.git'}]",
       "--patch_root",
       "pdfium/third_party/skia",
       "--revision_mapping_file",
       "{\"got_pdfium_revision\": \"pdfium\", \"got_revision\": \"pdfium/third_party/skia\"}",
       "--git-cache-dir",
-      "[CUSTOM_/_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--gerrit_repo",
@@ -53,7 +53,7 @@
       "--revision",
       "pdfium/third_party/skia@abc123"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
diff --git a/infra/bots/recipe_modules/core/examples/full.expected/test.json b/infra/bots/recipe_modules/core/examples/full.expected/test.json
index 82df2360ab..ef0d4965bc 100644
--- a/infra/bots/recipe_modules/core/examples/full.expected/test.json
+++ b/infra/bots/recipe_modules/core/examples/full.expected/test.json
@@ -9,7 +9,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_C:\\_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_C:\\_B_WORK]/.gclient_entries"
+      "[START_DIR]/cache/work/.gclient_entries"
     ],
     "infra_step": true,
-    "name": "remove [CUSTOM_C:\\_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_C:\\\\_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_C:\\_B_CACHE]",
+      "[START_DIR]/cache/git",
       "--cleanup-dir",
       "[CLEANUP]/bot_update",
       "--gerrit_repo",
@@ -51,7 +51,7 @@
       "--revision",
       "skia@abc123"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]",
+    "cwd": "[START_DIR]/cache/work",
     "env_prefixes": {
       "PATH": [
         "RECIPE_PACKAGE_REPO[depot_tools]"
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_API26.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_API26.json
index a3ad9608e0..a69acebd09 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_API26.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_API26.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/android_ndk_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/android_ndk_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_API26"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_API26"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_API26/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_API26/Release",
       "--args=extra_cflags=[\"-DDUMMY_ndk_version=42\"] is_debug=false ndk=\"[START_DIR]/android_ndk_linux\" ndk_api=26 target_cpu=\"arm\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_API26"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_API26"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_API26/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_API26/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_API26"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_API26"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_ASAN.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_ASAN.json
index 07347cc401..05ce497a28 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_ASAN.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Android_ASAN.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/android_ndk_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/android_ndk_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN/Release",
       "--args=extra_cflags=[\"-DDUMMY_ndk_version=42\"] is_debug=false ndk=\"[START_DIR]/android_ndk_linux\" ndk_api=21 sanitize=\"ASAN\" target_cpu=\"arm\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Android_ASAN"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Chromebook_GLES.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Chromebook_GLES.json
index 6e2e365730..10a00fc0af 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Chromebook_GLES.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm-Release-Chromebook_GLES.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,33 +17,33 @@
     "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",
       "LD_LIBRARY_PATH": "[START_DIR]/armhf_sysroot/lib",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES/Release",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_asmflags=[\"--target=armv7a-linux-gnueabihf\", \"--sysroot=[START_DIR]/armhf_sysroot\", \"-march=armv7-a\", \"-mfpu=neon\", \"-mthumb\"] extra_cflags=[\"--target=armv7a-linux-gnueabihf\", \"--sysroot=[START_DIR]/armhf_sysroot\", \"-I[START_DIR]/chromebook_arm_gles/include\", \"-I[START_DIR]/armhf_sysroot/include\", \"-I[START_DIR]/armhf_sysroot/include/c++/4.8.4\", \"-I[START_DIR]/armhf_sysroot/include/c++/4.8.4/arm-linux-gnueabihf\", \"-DMESA_EGL_NO_X11_HEADERS\", \"-DDUMMY_clang_linux_version=42\"] extra_ldflags=[\"--target=armv7a-linux-gnueabihf\", \"--sysroot=[START_DIR]/armhf_sysroot\", \"-B[START_DIR]/armhf_sysroot/bin\", \"-B[START_DIR]/armhf_sysroot/gcc-cross\", \"-L[START_DIR]/armhf_sysroot/gcc-cross\", \"-L[START_DIR]/armhf_sysroot/lib\", \"-L[START_DIR]/chromebook_arm_gles/lib\"] is_debug=false skia_use_egl=true skia_use_fontconfig=false skia_use_system_freetype2=false target_cpu=\"arm\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "LD_LIBRARY_PATH": "[START_DIR]/armhf_sysroot/lib",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES"
     },
     "name": "gn gen"
   },
@@ -53,17 +53,17 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES/Release",
       "nanobench",
       "dm"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "LD_LIBRARY_PATH": "[START_DIR]/armhf_sysroot/lib",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm-Release-Chromebook_GLES"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm64-Release-Android_ASAN.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm64-Release-Android_ASAN.json
index 4f28854507..646dd1bee0 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm64-Release-Android_ASAN.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-arm64-Release-Android_ASAN.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/android_ndk_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/android_ndk_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN/Release",
       "--args=extra_cflags=[\"-DDUMMY_ndk_version=42\"] is_debug=false ndk=\"[START_DIR]/android_ndk_linux\" sanitize=\"ASAN\" target_cpu=\"arm64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-arm64-Release-Android_ASAN"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-universal-devrel-Android_SKQP.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-universal-devrel-Android_SKQP.json
index 6dee9daf05..30d12b2a50 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-universal-devrel-Android_SKQP.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-universal-devrel-Android_SKQP.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/android_ndk_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/android_ndk_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,14 +17,14 @@
     "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": "devrel",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
     },
     "infra_step": true,
     "name": "fetch-gn"
@@ -40,7 +40,7 @@
       "GOPATH": "[START_DIR]/gopath",
       "GOROOT": "[START_DIR]/go/go",
       "PATH": "[START_DIR]/go/go/bin:[START_DIR]/gopath:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
     },
     "name": "go version"
   },
@@ -55,7 +55,7 @@
       "GOPATH": "[START_DIR]/gopath",
       "GOROOT": "[START_DIR]/go/go",
       "PATH": "[START_DIR]/go/go/bin:[START_DIR]/gopath:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
     },
     "name": "env go version"
   },
@@ -73,7 +73,7 @@
       "GOPATH": "[START_DIR]/gopath",
       "GOROOT": "[START_DIR]/go/go",
       "PATH": "[START_DIR]/go/go/bin:[START_DIR]/gopath:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
     },
     "name": "update go pkgs"
   },
@@ -82,8 +82,8 @@
       "go",
       "build",
       "-o",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP/devrel/run_testlab",
-      "[CUSTOM_/_B_WORK]/skia/infra/cts/run_testlab.go"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP/devrel/run_testlab",
+      "[START_DIR]/cache/work/skia/infra/cts/run_testlab.go"
     ],
     "env": {
       "BUILDTYPE": "devrel",
@@ -91,23 +91,23 @@
       "GOPATH": "[START_DIR]/gopath",
       "GOROOT": "[START_DIR]/go/go",
       "PATH": "[START_DIR]/go/go/bin:[START_DIR]/gopath:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
     },
     "name": "build firebase runner"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/tools/skqp/make_universal_apk"
+      "[START_DIR]/cache/work/skia/tools/skqp/make_universal_apk"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "ANDROID_HOME": "[START_DIR]/android_sdk_linux/android-sdk",
       "ANDROID_NDK": "[START_DIR]/android_ndk_linux",
-      "APK_OUTPUT_DIR": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP/devrel",
+      "APK_OUTPUT_DIR": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP/devrel",
       "BUILDTYPE": "devrel",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-universal-devrel-Android_SKQP"
     },
     "name": "make_universal"
   },
@@ -119,7 +119,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/cts/whitelist_devices.json",
+      "[START_DIR]/cache/work/skia/infra/cts/whitelist_devices.json",
       "[START_DIR]/[SWARM_OUT_DIR]"
     ],
     "infra_step": true,
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES.json
index da96284755..a078e34384 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES/Debug",
       "--args=cc=\"[START_DIR]/clang_linux/bin/clang\" cxx=\"[START_DIR]/clang_linux/bin/clang++\" extra_asmflags=[] extra_cflags=[\"-DMESA_EGL_NO_X11_HEADERS\", \"-I[START_DIR]/chromebook_x86_64_gles/include\", \"-DDUMMY_clang_linux_version=42\"] extra_ldflags=[\"-L[START_DIR]/chromebook_x86_64_gles/lib\", \"-static-libstdc++\", \"-static-libgcc\", \"-fuse-ld=lld\"] skia_use_egl=true skia_use_fontconfig=false skia_use_system_freetype2=false target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES"
     },
     "name": "gn gen"
   },
@@ -51,16 +51,16 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES/Debug",
       "nanobench",
       "dm"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-Chromebook_GLES"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41.json
index e9455576d1..bdb433f2de 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41/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\", \"-DSK_CPU_LIMIT_SSE41\", \"-DSKCMS_PORTABLE\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\"] target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_CPU_LIMIT_SSE41"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE.json
index 435eae2194..fd55e9c8fe 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE/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\", \"-DSK_USE_DISCARDABLE_SCALEDIMAGECACHE\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\"] target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Debug-SK_USE_DISCARDABLE_SCALEDIMAGECACHE"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Fast.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Fast.json
index 98475cfaf4..787491ef69 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Fast.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Fast.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Fast"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Fast"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Fast/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Fast/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\", \"-march=native\", \"-fomit-frame-pointer\", \"-O3\", \"-ffp-contract=off\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\"] is_debug=false target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Fast"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Fast"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Fast/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Fast/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Fast"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Fast"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Mini.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Mini.json
index f61cc7e46a..6000c10ee0 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Mini.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Mini.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Mini"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Mini"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Mini/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Mini/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\"] is_component_build=true is_debug=false is_official_build=true skia_enable_effects=false skia_enable_gpu=true skia_enable_pdf=false skia_use_expat=false skia_use_libjpeg_turbo=false skia_use_libpng=false skia_use_libwebp=false skia_use_zlib=false target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Mini"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Mini"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Mini/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Mini/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Mini"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Mini"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-SwiftShader.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-SwiftShader.json
index a7df278e86..70ae6b8122 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-SwiftShader.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-SwiftShader.json
@@ -7,7 +7,7 @@
       "--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,
@@ -23,7 +23,7 @@
       "ensure-directory",
       "--mode",
       "0777",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out"
     ],
     "infra_step": true,
     "name": "makedirs swiftshader_out"
@@ -31,17 +31,17 @@
   {
     "cmd": [
       "cmake",
-      "[CUSTOM_/_B_WORK]/skia/third_party/externals/swiftshader",
+      "[START_DIR]/cache/work/skia/third_party/externals/swiftshader",
       "-GNinja"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
+    "cwd": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
     "env": {
       "BUILDTYPE": "Release",
       "CC": "[START_DIR]/clang_linux/bin/clang",
       "CHROME_HEADLESS": "1",
       "CXX": "[START_DIR]/clang_linux/bin/clang++",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]:[START_DIR]/cmake_linux/bin",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
     },
     "name": "swiftshader cmake"
   },
@@ -49,18 +49,18 @@
     "cmd": [
       "ninja",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
       "libEGL.so",
       "libGLESv2.so"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
+    "cwd": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
     "env": {
       "BUILDTYPE": "Release",
       "CC": "[START_DIR]/clang_linux/bin/clang",
       "CHROME_HEADLESS": "1",
       "CXX": "[START_DIR]/clang_linux/bin/clang++",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]:[START_DIR]/cmake_linux/bin",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
     },
     "name": "swiftshader ninja"
   },
@@ -68,31 +68,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/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\", \"-DGR_EGL_TRY_GLES3_THEN_GLES2\", \"-I[CUSTOM_/_B_WORK]/skia/third_party/externals/swiftshader/include\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-L[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out\"] is_debug=false skia_use_egl=true target_cpu=\"x86_64\""
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/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\", \"-DGR_EGL_TRY_GLES3_THEN_GLES2\", \"-I[START_DIR]/cache/work/skia/third_party/externals/swiftshader/include\"] extra_ldflags=[\"-B[START_DIR]/clang_linux/bin\", \"-fuse-ld=lld\", \"-L[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out\"] is_debug=false skia_use_egl=true target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
     },
     "name": "gn gen"
   },
@@ -102,14 +102,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader"
     },
     "name": "ninja"
   },
@@ -118,7 +118,7 @@
       "python",
       "-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",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-SwiftShader/swiftshader_out",
       "[START_DIR]/[SWARM_OUT_DIR]/out/swiftshader_out"
     ],
     "infra_step": true,
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Vulkan.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Vulkan.json
index c89c2b2493..6a24e90bc4 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Vulkan.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-Clang-x86_64-Release-Vulkan.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan/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\"] is_debug=false skia_enable_vulkan_debug_layers=false skia_vulkan_sdk=\"[START_DIR]/linux_vulkan_sdk\" target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-Clang-x86_64-Release-Vulkan"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-EMCC-wasm-Release.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-EMCC-wasm-Release.json
index caf77dcae5..863f7ea7b1 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-EMCC-wasm-Release.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-EMCC-wasm-Release.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/emscripten_sdk/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/emscripten_sdk/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-EMCC-wasm-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-EMCC-wasm-Release"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-EMCC-wasm-Release/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-EMCC-wasm-Release/Release",
       "--args=cc=\"[START_DIR]/emscripten_sdk/emscripten/incoming/emcc\" cxx=\"[START_DIR]/emscripten_sdk/emscripten/incoming/em++\" extra_cflags=[\"-Wno-unknown-warning-option\", \"-DDUMMY_emscripten_sdk_version=42\"] is_debug=false skia_enable_gpu=false skia_use_dng_sdk=false skia_use_fontconfig=false skia_use_freetype=false skia_use_icu=false target_cpu=\"wasm\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "[START_DIR]/emscripten_sdk/clang/fastcomp/build_incoming_64/bin:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-EMCC-wasm-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-EMCC-wasm-Release"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-EMCC-wasm-Release/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-EMCC-wasm-Release/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "[START_DIR]/emscripten_sdk/clang/fastcomp/build_incoming_64/bin:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-EMCC-wasm-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-EMCC-wasm-Release"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-loongson3a-Release.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-loongson3a-Release.json
index 92099f6c9b..e6b90c0cfd 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-loongson3a-Release.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-loongson3a-Release.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/mips64el_toolchain_linux/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/mips64el_toolchain_linux/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,32 +17,32 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-loongson3a-Release"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-loongson3a-Release/Release",
       "--args=cc=\"[START_DIR]/mips64el_toolchain_linux/bin/mips64el-linux-gnuabi64-gcc-7\" cxx=\"[START_DIR]/mips64el_toolchain_linux/bin/mips64el-linux-gnuabi64-g++-7\" extra_cflags=[\"-Wno-format-truncation\", \"-Wno-uninitialized\", \"-DDUMMY_mips64el_toolchain_linux_version=42\", \"-Wno-strict-overflow\"] extra_ldflags=[\"-L[START_DIR]/mips64el_toolchain_linux/mips64el-linux-gnuabi64/lib\"] is_debug=false skia_enable_gpu=false skia_use_fontconfig=false skia_use_system_freetype2=false target_cpu=\"loongson3a\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "LD_LIBRARY_PATH": "[START_DIR]/mips64el_toolchain_linux/lib/x86_64-linux-gnu/",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-loongson3a-Release"
     },
     "name": "gn gen"
   },
@@ -52,15 +52,15 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-loongson3a-Release/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "LD_LIBRARY_PATH": "[START_DIR]/mips64el_toolchain_linux/lib/x86_64-linux-gnu/",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-loongson3a-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-loongson3a-Release"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Debug-EmbededResouces.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Debug-EmbededResouces.json
index 206b359afe..5d5fa6ba0e 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Debug-EmbededResouces.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Debug-EmbededResouces.json
@@ -3,31 +3,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces/Debug",
       "--args=cc=\"gcc\" cxx=\"g++\" extra_cflags=[\"-O1\"] skia_embed_resoucres=true target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces"
     },
     "name": "gn gen"
   },
@@ -37,14 +37,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Debug-EmbededResouces"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-ANGLE.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-ANGLE.json
index 9257b13d44..77a47b269f 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-ANGLE.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-ANGLE.json
@@ -3,31 +3,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE/Release",
       "--args=cc=\"gcc\" cxx=\"g++\" is_debug=false skia_use_angle=true target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE"
     },
     "name": "gn gen"
   },
@@ -37,14 +37,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-ANGLE"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Flutter_Android.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Flutter_Android.json
index df0b1af034..13401a8ac8 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Flutter_Android.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Flutter_Android.json
@@ -6,7 +6,7 @@
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/flutter/src",
+    "cwd": "[START_DIR]/cache/work/flutter/src",
     "env": {
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]"
     },
@@ -20,9 +20,9 @@
       "--json-output",
       "/path/to/tmp/json",
       "rmtree",
-      "[CUSTOM_/_B_WORK]/flutter/src/out/android_release"
+      "[START_DIR]/cache/work/flutter/src/out/android_release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/flutter/src",
+    "cwd": "[START_DIR]/cache/work/flutter/src",
     "infra_step": true,
     "name": "rmtree android_release"
   },
@@ -32,12 +32,12 @@
       "--runtime-mode=release",
       "--android"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/flutter/src",
+    "cwd": "[START_DIR]/cache/work/flutter/src",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/flutter/src/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-Flutter_Android"
+      "SKIA_OUT": "[START_DIR]/cache/work/flutter/src/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-Flutter_Android"
     },
     "name": "gn_gen"
   },
@@ -48,12 +48,12 @@
       "out/android_release",
       "-j100"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/flutter/src",
+    "cwd": "[START_DIR]/cache/work/flutter/src",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/flutter/src/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-Flutter_Android"
+      "SKIA_OUT": "[START_DIR]/cache/work/flutter/src/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-Flutter_Android"
     },
     "name": "build_flutter"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-NoGPU.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-NoGPU.json
index 48969fb3cf..6188af0c8b 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-NoGPU.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-NoGPU.json
@@ -3,31 +3,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU/Release",
       "--args=cc=\"gcc\" cxx=\"g++\" is_debug=false skia_enable_gpu=false target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU"
     },
     "name": "gn gen"
   },
@@ -37,14 +37,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-NoGPU"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium.json
index 9c31d772cc..0df8515dda 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium.json
@@ -6,7 +6,7 @@
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]"
@@ -19,13 +19,13 @@
       "build/linux/sysroot_scripts/install-sysroot.py",
       "--arch=amd64"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium"
+      "SKIA_OUT": "[START_DIR]/cache/work/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium"
     },
     "name": "sysroot"
   },
@@ -36,14 +36,14 @@
       "out/skia",
       "--args=pdf_is_standalone=true clang_use_chrome_plugins=false is_component_build=false is_debug=false pdf_use_skia=true"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "CHROMIUM_BUILDTOOLS_PATH": "[CUSTOM_/_B_WORK]/pdfium/buildtools",
+      "CHROMIUM_BUILDTOOLS_PATH": "[START_DIR]/cache/work/pdfium/buildtools",
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium"
+      "SKIA_OUT": "[START_DIR]/cache/work/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium"
     },
     "name": "gn_gen"
   },
@@ -54,14 +54,14 @@
       "out/skia",
       "-j100"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "CHROMIUM_BUILDTOOLS_PATH": "[CUSTOM_/_B_WORK]/pdfium/buildtools",
+      "CHROMIUM_BUILDTOOLS_PATH": "[START_DIR]/cache/work/pdfium/buildtools",
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium"
+      "SKIA_OUT": "[START_DIR]/cache/work/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium"
     },
     "name": "build_pdfium"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths.json
index 2c0f40ff7e..b8bedc2f26 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths.json
@@ -6,7 +6,7 @@
       "RECIPE_PACKAGE_REPO[depot_tools]/gclient.py",
       "runhooks"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]"
@@ -19,13 +19,13 @@
       "build/linux/sysroot_scripts/install-sysroot.py",
       "--arch=amd64"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths"
+      "SKIA_OUT": "[START_DIR]/cache/work/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths"
     },
     "name": "sysroot"
   },
@@ -36,14 +36,14 @@
       "out/skia",
       "--args=pdf_is_standalone=true clang_use_chrome_plugins=false is_component_build=false is_debug=false pdf_use_skia_paths=true"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "CHROMIUM_BUILDTOOLS_PATH": "[CUSTOM_/_B_WORK]/pdfium/buildtools",
+      "CHROMIUM_BUILDTOOLS_PATH": "[START_DIR]/cache/work/pdfium/buildtools",
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths"
+      "SKIA_OUT": "[START_DIR]/cache/work/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths"
     },
     "name": "gn_gen"
   },
@@ -54,14 +54,14 @@
       "out/skia",
       "-j100"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/pdfium",
+    "cwd": "[START_DIR]/cache/work/pdfium",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "CHROMIUM_BUILDTOOLS_PATH": "[CUSTOM_/_B_WORK]/pdfium/buildtools",
+      "CHROMIUM_BUILDTOOLS_PATH": "[START_DIR]/cache/work/pdfium/buildtools",
       "DEPOT_TOOLS_UPDATE": "0",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths"
+      "SKIA_OUT": "[START_DIR]/cache/work/pdfium/third_party/skia/out/Build-Debian9-GCC-x86_64-Release-PDFium_SkiaPaths"
     },
     "name": "build_pdfium"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Shared.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Shared.json
index d34dc8701e..add87e5cef 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Shared.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Debian9-GCC-x86_64-Release-Shared.json
@@ -3,31 +3,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-Shared"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-Shared"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-Shared/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-Shared/Release",
       "--args=cc=\"gcc\" cxx=\"g++\" is_component_build=true is_debug=false target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-Shared"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-Shared"
     },
     "name": "gn gen"
   },
@@ -37,14 +37,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-Shared/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-Shared/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Debian9-GCC-x86_64-Release-Shared"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Debian9-GCC-x86_64-Release-Shared"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-Android_Vulkan.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-Android_Vulkan.json
index 846634c05d..c7b06d6c25 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-Android_Vulkan.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-Android_Vulkan.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/android_ndk_darwin/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/android_ndk_darwin/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan/Debug",
       "--args=extra_cflags=[\"-O1\", \"-DDUMMY_ndk_version=42\"] ndk=\"[START_DIR]/android_ndk_darwin\" ndk_api=24 skia_enable_vulkan_debug_layers=false target_cpu=\"arm64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-Android_Vulkan"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-iOS.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-iOS.json
index a75f13c717..30d564fa23 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-iOS.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-arm64-Debug-iOS.json
@@ -3,31 +3,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-iOS"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-iOS"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-iOS/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-iOS/Debug",
       "--args=cc=\"clang\" cxx=\"clang++\" extra_cflags=[\"-O1\"] skia_ios_identity=\".*GS9WA.*\" skia_ios_profile=\"Upstream Testing Provisioning Profile\" target_cpu=\"arm64\" target_os=\"ios\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-iOS"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-iOS"
     },
     "name": "gn gen"
   },
@@ -37,14 +37,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-iOS/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-iOS/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-arm64-Debug-iOS"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-arm64-Debug-iOS"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-CommandBuffer.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-CommandBuffer.json
index 6a1b1f600c..8c7a6faa76 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-CommandBuffer.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-CommandBuffer.json
@@ -3,11 +3,11 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/tools/build_command_buffer.py",
+      "[START_DIR]/cache/work/skia/tools/build_command_buffer.py",
       "--chrome-dir",
-      "[CUSTOM_/_B_WORK]",
+      "[START_DIR]/cache/work",
       "--output-dir",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer/Debug",
       "--no-sync",
       "--no-hooks",
       "--make-output-dir"
@@ -16,7 +16,7 @@
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
     },
     "name": "build command_buffer"
   },
@@ -24,31 +24,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer/Debug",
       "--args=cc=\"clang\" cxx=\"clang++\" extra_cflags=[\"-O1\"] target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
     },
     "name": "gn gen"
   },
@@ -58,14 +58,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-CommandBuffer"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-Metal.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-Metal.json
index 4333e95cc9..783221a11e 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-Metal.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Mac-Clang-x86_64-Debug-Metal.json
@@ -3,31 +3,31 @@
     "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",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-Metal"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-Metal"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-Metal/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-Metal/Debug",
       "--args=cc=\"clang\" cxx=\"clang++\" extra_cflags=[\"-O1\"] skia_use_metal=true target_cpu=\"x86_64\""
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-Metal"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-Metal"
     },
     "name": "gn gen"
   },
@@ -37,14 +37,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-Metal/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-Metal/Debug"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_/_B_WORK]/skia/out/Build-Mac-Clang-x86_64-Debug-Metal"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Mac-Clang-x86_64-Debug-Metal"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-arm64-Release-Android.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-arm64-Release-Android.json
index 7c6eb71db0..383ad76335 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-arm64-Release-Android.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-arm64-Release-Android.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_C:\\_B_WORK]/skia/infra/bots/assets/android_ndk_windows/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/android_ndk_windows/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-arm64-Release-Android"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-arm64-Release-Android"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/gn.exe",
+      "[START_DIR]/cache/work/skia/bin/gn.exe",
       "gen",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-arm64-Release-Android/Release",
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-arm64-Release-Android/Release",
       "--args=extra_cflags=[\"-DDUMMY_ndk_version=42\"] is_debug=false ndk=\"[START_DIR]/n\" target_cpu=\"arm64\""
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-arm64-Release-Android"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-arm64-Release-Android"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-arm64-Release-Android/Release"
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-arm64-Release-Android/Release"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-arm64-Release-Android"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-arm64-Release-Android"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86-Debug-Exceptions.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86-Debug-Exceptions.json
index 822c2738c3..307d949e6c 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86-Debug-Exceptions.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86-Debug-Exceptions.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_C:\\_B_WORK]/skia/infra/bots/assets/clang_win/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_win/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86-Debug-Exceptions"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86-Debug-Exceptions"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/gn.exe",
+      "[START_DIR]/cache/work/skia/bin/gn.exe",
       "gen",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86-Debug-Exceptions/Debug",
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86-Debug-Exceptions/Debug",
       "--args=cc=\"clang\" clang_win=\"[START_DIR]/clang_win\" cxx=\"clang++\" extra_cflags=[\"-O1\", \"/EHsc\", \"-DDUMMY_clang_win_version=42\"] target_cpu=\"x86\" win_sdk=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/win_sdk\" win_vc=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/VC\""
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86-Debug-Exceptions"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86-Debug-Exceptions"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86-Debug-Exceptions/Debug"
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86-Debug-Exceptions/Debug"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86-Debug-Exceptions"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86-Debug-Exceptions"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Debug-GDI.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Debug-GDI.json
index 97e14930b6..ab166a7201 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Debug-GDI.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Debug-GDI.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_C:\\_B_WORK]/skia/infra/bots/assets/clang_win/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_win/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Debug-GDI"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Debug-GDI"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/gn.exe",
+      "[START_DIR]/cache/work/skia/bin/gn.exe",
       "gen",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Debug-GDI/Debug_x64",
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Debug-GDI/Debug_x64",
       "--args=cc=\"clang\" clang_win=\"[START_DIR]/clang_win\" cxx=\"clang++\" extra_cflags=[\"-O1\", \"-DDUMMY_clang_win_version=42\"] target_cpu=\"x86_64\" win_sdk=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/win_sdk\" win_vc=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/VC\""
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Debug-GDI"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Debug-GDI"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Debug-GDI/Debug_x64"
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Debug-GDI/Debug_x64"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Debug_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Debug-GDI"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Debug-GDI"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release-Vulkan.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release-Vulkan.json
index a844cff802..fd151d72de 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release-Vulkan.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release-Vulkan.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_C:\\_B_WORK]/skia/infra/bots/assets/clang_win/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_win/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/gn.exe",
+      "[START_DIR]/cache/work/skia/bin/gn.exe",
       "gen",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan/Release_x64",
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan/Release_x64",
       "--args=cc=\"clang\" clang_win=\"[START_DIR]/clang_win\" cxx=\"clang++\" extra_cflags=[\"-DDUMMY_clang_win_version=42\"] is_debug=false skia_enable_vulkan_debug_layers=false skia_vulkan_sdk=\"[START_DIR]/win_vulkan_sdk\" target_cpu=\"x86_64\" win_sdk=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/win_sdk\" win_vc=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/VC\""
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan/Release_x64"
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan/Release_x64"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release.json
index b21990314d..2e5d55d5b2 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Build-Win-Clang-x86_64-Release.json
@@ -7,7 +7,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_C:\\_B_WORK]/skia/infra/bots/assets/clang_win/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/clang_win/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -17,31 +17,31 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/fetch-gn"
+      "[START_DIR]/cache/work/skia/bin/fetch-gn"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release"
     },
     "infra_step": true,
     "name": "fetch-gn"
   },
   {
     "cmd": [
-      "[CUSTOM_C:\\_B_WORK]/skia/bin/gn.exe",
+      "[START_DIR]/cache/work/skia/bin/gn.exe",
       "gen",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release/Release_x64",
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release/Release_x64",
       "--args=cc=\"clang\" clang_win=\"[START_DIR]/clang_win\" cxx=\"clang++\" extra_cflags=[\"-DDUMMY_clang_win_version=42\"] is_debug=false target_cpu=\"x86_64\" win_sdk=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/win_sdk\" win_vc=\"[START_DIR]/t/depot_tools/win_toolchain/vs_files/a9e1098bba66d2acccc377d5ee81265910f29272/VC\""
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release"
     },
     "name": "gn gen"
   },
@@ -51,14 +51,14 @@
       "-k",
       "0",
       "-C",
-      "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release/Release_x64"
+      "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release/Release_x64"
     ],
-    "cwd": "[CUSTOM_C:\\_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release"
     },
     "name": "ninja"
   },
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Housekeeper-PerCommit-CheckGeneratedFiles.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Housekeeper-PerCommit-CheckGeneratedFiles.json
index 964fe89f6c..a6975b514e 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Housekeeper-PerCommit-CheckGeneratedFiles.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Housekeeper-PerCommit-CheckGeneratedFiles.json
@@ -3,9 +3,9 @@
     "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",
@@ -19,9 +19,9 @@
     "cmd": [
       "python",
       "-u",
-      "[CUSTOM_/_B_WORK]/skia/bin/fetch-clang-format"
+      "[START_DIR]/cache/work/skia/bin/fetch-clang-format"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -33,16 +33,16 @@
   },
   {
     "cmd": [
-      "[CUSTOM_/_B_WORK]/skia/bin/gn",
+      "[START_DIR]/cache/work/skia/bin/gn",
       "gen",
       "[START_DIR]/build/out/Release",
       "--args=is_debug=false skia_compile_processors=true skia_generate_workarounds=true"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "PATH": "[CUSTOM_/_B_WORK]/skia/bin:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
+      "PATH": "[START_DIR]/cache/work/skia/bin:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
       "SKIA_OUT": "[START_DIR]/build/out"
     },
     "name": "gn gen"
@@ -55,11 +55,11 @@
       "-C",
       "[START_DIR]/build/out/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
-      "PATH": "[CUSTOM_/_B_WORK]/skia/bin:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
+      "PATH": "[START_DIR]/cache/work/skia/bin:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
       "SKIA_OUT": "[START_DIR]/build/out"
     },
     "name": "ninja"
@@ -128,7 +128,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/skp/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/skp/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -156,7 +156,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/skimage/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/skimage/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -184,7 +184,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/svg/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/svg/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
diff --git a/infra/bots/recipe_modules/flavor/examples/full.expected/Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_1k_SKPs.json b/infra/bots/recipe_modules/flavor/examples/full.expected/Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_1k_SKPs.json
index 84aca5d680..87c71d95f5 100644
--- a/infra/bots/recipe_modules/flavor/examples/full.expected/Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_1k_SKPs.json
+++ b/infra/bots/recipe_modules/flavor/examples/full.expected/Perf-Ubuntu14-Clang-GCE-CPU-AVX2-x86_64-Release-All-CT_BENCH_1k_SKPs.json
@@ -7,7 +7,7 @@
       "--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,
@@ -17,9 +17,9 @@
     "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",
@@ -31,12 +31,12 @@
   },
   {
     "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",
@@ -53,7 +53,7 @@
       "-C",
       "[START_DIR]/build/out/Release"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
@@ -126,7 +126,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/skp/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/skp/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -154,7 +154,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/skimage/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/skimage/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -182,7 +182,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_/_B_WORK]/skia/infra/bots/assets/svg/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/svg/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -212,7 +212,7 @@
       "[START_DIR]/build/out/Release/nanobench",
       "--some-flag"
     ],
-    "cwd": "[CUSTOM_/_B_WORK]/skia",
+    "cwd": "[START_DIR]/cache/work/skia",
     "env": {
       "BUILDTYPE": "Release",
       "CHROME_HEADLESS": "1",
diff --git a/infra/bots/recipe_modules/run/examples/full.expected/test.json b/infra/bots/recipe_modules/run/examples/full.expected/test.json
index e183a110cc..0d4e279414 100644
--- a/infra/bots/recipe_modules/run/examples/full.expected/test.json
+++ b/infra/bots/recipe_modules/run/examples/full.expected/test.json
@@ -7,7 +7,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "fail",
     "~followup_annotations": [
@@ -23,7 +23,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "fail again",
     "~followup_annotations": [
@@ -40,7 +40,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "do a thing"
   },
@@ -53,7 +53,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "run 0"
   },
@@ -106,7 +106,7 @@
       "--json-output",
       "/path/to/tmp/json",
       "copy",
-      "[CUSTOM_C:\\_B_WORK]/skia/infra/bots/assets/my_asset/VERSION",
+      "[START_DIR]/cache/work/skia/infra/bots/assets/my_asset/VERSION",
       "/path/to/tmp/"
     ],
     "infra_step": true,
@@ -120,7 +120,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "mydir:<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "env"
   },
@@ -170,7 +170,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry fail",
     "~followup_annotations": [
@@ -187,7 +187,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "between_attempts #1"
   },
@@ -199,7 +199,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry fail (attempt 2)",
     "~followup_annotations": [
@@ -216,7 +216,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "between_attempts #2"
   },
@@ -228,7 +228,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry fail (attempt 3)",
     "~followup_annotations": [
@@ -245,7 +245,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "between_attempts #3"
   },
@@ -257,7 +257,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry fail (attempt 4)",
     "~followup_annotations": [
@@ -274,7 +274,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "between_attempts #4"
   },
@@ -286,7 +286,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry fail (attempt 5)",
     "~followup_annotations": [
@@ -302,7 +302,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry success",
     "~followup_annotations": [
@@ -319,7 +319,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "between_attempts #1 (2)"
   },
@@ -331,7 +331,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry success (attempt 2)",
     "~followup_annotations": [
@@ -348,7 +348,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "between_attempts #2 (2)"
   },
@@ -360,7 +360,7 @@
       "BUILDTYPE": "Release_x64",
       "CHROME_HEADLESS": "1",
       "PATH": "<PATH>:RECIPE_PACKAGE_REPO[depot_tools]",
-      "SKIA_OUT": "[CUSTOM_C:\\_B_WORK]/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
+      "SKIA_OUT": "[START_DIR]/cache/work/skia/out/Build-Win-Clang-x86_64-Release-Vulkan"
     },
     "name": "retry success (attempt 3)"
   },
diff --git a/infra/bots/recipe_modules/vars/api.py b/infra/bots/recipe_modules/vars/api.py
index 26bde8c9d8..28589377cd 100644
--- a/infra/bots/recipe_modules/vars/api.py
+++ b/infra/bots/recipe_modules/vars/api.py
@@ -15,12 +15,6 @@ CONFIG_RELEASE = 'Release'
 
 class SkiaVarsApi(recipe_api.RecipeApi):
 
-  def make_path(self, *path):
-    """Return a Path object for the given path."""
-    key  = 'custom_%s' % '_'.join(path)
-    self.m.path.c.base_paths[key] = tuple(path)
-    return self.m.path[key]
-
   def setup(self):
     """Prepare the variables."""
     # Setup
@@ -59,13 +53,10 @@ class SkiaVarsApi(recipe_api.RecipeApi):
     if 'Coverage' in self.builder_name and 'Upload' in self.builder_name:
       self.persistent_checkout = True
 
+    self.cache_dir = self.slave_dir.join('cache')
     if self.persistent_checkout:
-      if 'Win' in self.builder_name:
-        self.checkout_root = self.make_path('C:\\', 'b', 'work')
-        self.gclient_cache = self.make_path('C:\\', 'b', 'cache')
-      else:
-        self.checkout_root = self.make_path('/', 'b', 'work')
-        self.gclient_cache = self.make_path('/', 'b', 'cache')
+      self.checkout_root = self.cache_dir.join('work')
+      self.gclient_cache = self.cache_dir.join('git')
 
       # got_revision is filled in after checkout steps.
       self.got_revision = None