anchor.diff:      String artifactsDir = tools.getEngineArtifactsDirectory(platform, buildMode).path;
       entryPointsDir = artifactsDir;
       dartEntryPointsDir = entryPointsDir;
  +    snapshotterDir = entryPointsDir;
       if (platform == TargetPlatform.ios) {
         genSnapshot = path.join(artifactsDir, 'gen_snapshot');
       } else {
  
positive.code:       ]);
        break;
      case TargetPlatform.ios:
        snapshotDartIOS = path.join(entryPointsDir, 'snapshot.dart');
        assembly = path.join(outputDir.path, 'snapshot_assembly.S');
        filePaths.addAll(<String>[
          snapshotDartIOS,
  
negative.code:     return null;
    }
  
    String entryPointsDir, dartEntryPointsDir, snapshotterDir, genSnapshot;
  
    String engineSrc = tools.engineSrcPath;
    if (engineSrc != null) {
      entryPointsDir  = path.join(engineSrc, 'flutter', 'sky', 'engine', 'bindings');
      dartEntryPointsDir = path.join(engineSrc, 'dart', 'runtime', 'bin');
      snapshotterDir = path.join(engineSrc, 'flutter', 'lib', 'snapshot');
      String engineOut = tools.getEngineArtifactsDirectory(platform, buildMode).path;
      if (platform == TargetPlatform.ios) {
        genSnapshot = path.join(engineOut, 'clang_x64', 'gen_snapshot');
  