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

scripts/slave/recipes/swarming/deterministic_build.expected/full_chromium_swarm_Linux_deterministic.json

 [
   {
     "cmd": [
       "python",
       "-u",
       "RECIPE_PACKAGE_REPO[build]/scripts/tools/runit.py",
       "--show-path",
       "python",
       "RECIPE_PACKAGE_REPO[build]/scripts/slave/cleanup_temp.py"
     ],
@@ skipping 267 matching lines @@
     "name": "First build",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
       "@@@STEP_LOG_END@json.output (invalid)@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "RECIPE_MODULE[build::isolate]/resources/remove_build_metadata.py",
+      "[SLAVE_BUILD]/src/tools/determinism/remove_build_metadata.py",
       "--build-dir",
-      "[SLAVE_BUILD]/src/out/Release",
-      "--src-dir",
-      "[SLAVE_BUILD]/src"
+      "[SLAVE_BUILD]/src/out/Release"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "remove_build_metadata",
     "~followup_annotations": [
       "step returned non-zero exit code: 1",
       "@@@STEP_WARNINGS@@@"
     ]
   },
   {
     "cmd": [
@@ skipping 140 matching lines @@
     "name": "Second build",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output (invalid)@null@@@",
       "@@@STEP_LOG_END@json.output (invalid)@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "RECIPE_MODULE[build::isolate]/resources/remove_build_metadata.py",
+      "[SLAVE_BUILD]/src/tools/determinism/remove_build_metadata.py",
       "--build-dir",
-      "[SLAVE_BUILD]/src/out/Release",
-      "--src-dir",
-      "[SLAVE_BUILD]/src"
+      "[SLAVE_BUILD]/src/out/Release"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "remove_build_metadata (2)"
   },
   {
     "cmd": [
       "python",
       "-u",
       "\nimport glob\nimport sys\nwith open(sys.argv[1], 'w') as f:\n  f.write('\\n'.join(glob.glob(sys.argv[2])))\n",
       "/path/to/tmp/",
@@ skipping 42 matching lines @@
       "@@@STEP_LOG_LINE@python.inline@if os.path.exists(sys.argv[2]):@@@",
       "@@@STEP_LOG_LINE@python.inline@  shutil.rmtree(sys.argv[2])@@@",
       "@@@STEP_LOG_LINE@python.inline@shutil.move(sys.argv[1], sys.argv[2])@@@",
       "@@@STEP_LOG_END@python.inline@@@"
     ]
   },
   {
     "cmd": [
       "python",
       "-u",
-      "RECIPE_MODULE[build::isolate]/resources/compare_build_artifacts.py",
+      "[SLAVE_BUILD]/src/tools/determinism/compare_build_artifacts.py",
       "--first-build-dir",
       "[SLAVE_BUILD]/src/out/Release.1",
       "--second-build-dir",
       "[SLAVE_BUILD]/src/out/Release.2",
       "--target-platform",
       "linux"
     ],
     "cwd": "[SLAVE_BUILD]",
     "name": "compare_build_artifacts"
   },
   {
     "name": "$result",
     "recipe_result": null,
     "status_code": 0
   }
 ]