1 files changed, 2 insertions, 4 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/sandbox/SandboxStrategy.java b/src/main/java/com/google/devtools/build/lib/sandbox/SandboxStrategy.java
index 7f477f02c0..e7cd425229 100644
--- a/src/main/java/com/google/devtools/build/lib/sandbox/SandboxStrategy.java
+++ b/src/main/java/com/google/devtools/build/lib/sandbox/SandboxStrategy.java
@@ -15,7 +15,6 @@
 package com.google.devtools.build.lib.sandbox;
 
 import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.ImmutableSet.Builder;
 import com.google.common.eventbus.EventBus;
 import com.google.devtools.build.lib.actions.ActionExecutionContext;
 import com.google.devtools.build.lib.actions.ActionExecutionMetadata;
@@ -184,12 +183,11 @@ abstract class SandboxStrategy implements SandboxedSpawnActionContext {
    */
   protected ImmutableSet<Path> getWritableDirs(Path sandboxExecRoot, Map<String, String> env)
       throws IOException {
-    Builder<Path> writableDirs = ImmutableSet.builder();
     // We have to make the TEST_TMPDIR directory writable if it is specified.
     if (env.containsKey("TEST_TMPDIR")) {
-      writableDirs.add(sandboxExecRoot.getRelative(env.get("TEST_TMPDIR")));
+      return ImmutableSet.of(sandboxExecRoot.getRelative(env.get("TEST_TMPDIR")));
     }
-    return writableDirs.build();
+    return ImmutableSet.of();
   }
 
   @Override