diff --git a/packages/metro-bundler/src/lib/GlobalTransformCache.js b/packages/metro-bundler/src/lib/GlobalTransformCache.js
index 1d2fe2c9..29585bee 100644
--- a/packages/metro-bundler/src/lib/GlobalTransformCache.js
+++ b/packages/metro-bundler/src/lib/GlobalTransformCache.js
@@ -232,9 +232,10 @@ class URIBasedGlobalTransformCache {
     hash.update(this._optionsHasher.getTransformWorkerOptionsDigest(transformOptions));
     const cacheKey = props.getTransformCacheKey(transformOptions);
     hash.update(JSON.stringify(cacheKey));
+    hash.update(JSON.stringify(localPath));
     hash.update(crypto.createHash('sha1').update(sourceCode).digest('hex'));
     const digest = hash.digest('hex');
-    return `${digest}-${localPath}`;
+    return `${digest}-${path.basename(localPath)}`;
   }
 
   /**
diff --git a/packages/metro-bundler/src/lib/__tests__/__snapshots__/GlobalTransformCache-test.js.snap b/packages/metro-bundler/src/lib/__tests__/__snapshots__/GlobalTransformCache-test.js.snap
index 9fadc646..88ce1547 100644
--- a/packages/metro-bundler/src/lib/__tests__/__snapshots__/GlobalTransformCache-test.js.snap
+++ b/packages/metro-bundler/src/lib/__tests__/__snapshots__/GlobalTransformCache-test.js.snap
@@ -19,12 +19,12 @@ Object {
 exports[`GlobalTransformCache fetches results 1`] = `
 Array [
   Object {
-    "code": "/* code from http://globalcache.com/cd6df9b7e86839dafc5e9b5b493a28cbc55074e7-some/where/foo.js */",
+    "code": "/* code from http://globalcache.com/b23da8c74218e6155fcaf590a0fedbd1d117c2ae-foo.js */",
     "dependencies": Array [],
     "dependencyOffsets": Array [],
   },
   Object {
-    "code": "/* code from http://globalcache.com/6329a317fcf94d74cc9a1de6442ee7c25e27a507-some/where/else/bar.js */",
+    "code": "/* code from http://globalcache.com/5e95f6c3e9bac0282480cda6f1a984ad8bc83e55-bar.js */",
     "dependencies": Array [],
     "dependencyOffsets": Array [],
   },