anchor.diff:      switch (targetPlatform) {
         case TargetPlatform.windows_x64:
           result.add(DevelopmentArtifact.windows);
  +        break;
  +      case TargetPlatform.linux_x64:
  +        result.add(DevelopmentArtifact.linux);
           break;
         default:
       }
  
positive.code:   UnpackCommand() {
      argParser.addOption(
        'target-platform',
        allowed: <String>['windows-x64'],
      );
      argParser.addOption('cache-dir',
          help: 'Location to output platform specific artifacts.');
  
negative.code:     'icudtl.dat',
      'cpp_client_wrapper/',
    ],
    TargetPlatform.linux_x64: <String>[
      'libflutter_linux_glfw.so',
      'flutter_export.h',
      'flutter_messenger.h',
      'flutter_plugin_registrar.h',
      'flutter_glfw.h',
      'icudtl.dat',
      'cpp_client_wrapper_glfw/',
    ]
  };
  
  /// Copies desktop artifacts to local cache directories.
  