Use files in path['checkout'] not resource.

scripts/slave/recipes/chromium.expected/full_chromium_fyi_ClangToTMac.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "\nimport sys, os\npath = sys.argv[1]\nmode = int(sys.argv[2])\nif not os.path.isdir(path):\n  if os.path.exists(path):\n    print \"%s exists but is not a dir\" % path\n    sys.exit(1)\n  os.makedirs(path, mode)\n",
       "[BUILDER_CACHE]/ClangToTMac",
       "511"
     ],
     "name": "makedirs checkout path",
@@ skipping 294 matching lines @@
     "env": {
       "GOMA_SERVICE_ACCOUNT_JSON_FILE": "/creds/service_accounts/service-account-goma-client.json",
       "LLVM_FORCE_HEAD_REVISION": "YES"
     },
     "name": "compile"
   },
   {
     "cmd": [
       "python",
       "-u",
-      "RECIPE_MODULE[build::isolate]/resources/remove_build_metadata.py",
+      "[BUILDER_CACHE]/ClangToTMac/src/tools/determinism/remove_build_metadata.py",
       "--build-dir",
-      "[BUILDER_CACHE]/ClangToTMac/src/out/Release",
-      "--src-dir",
-      "[BUILDER_CACHE]/ClangToTMac/src"
+      "[BUILDER_CACHE]/ClangToTMac/src/out/Release"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "remove_build_metadata"
   },
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_MODULE[build::isolate]/resources/isolate.py",
       "[BUILDER_CACHE]/ClangToTMac/src/tools/swarming_client",
@@ skipping 104 matching lines @@
       "LLVM_FORCE_HEAD_REVISION": "YES"
     },
     "name": "sizes"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]