anchor.diff:        return '';
       case Artifact.skyEnginePath:
         return 'sky_engine';
  -    case Artifact.flutterMacOSPodspec:
  -      return 'FlutterMacOS.podspec';
       case Artifact.fuchsiaKernelCompiler:
         return 'kernel_compiler.snapshot';
       case Artifact.fuchsiaFlutterRunner:
  
positive.code: 
    /// The root of the sky_engine package.
    skyEnginePath,
    /// The location of the macOS engine podspec file.
    flutterMacOSPodspec,
  
    // Fuchsia artifacts from the engine prebuilts.
    fuchsiaKernelCompiler,
  
negative.code:       case Artifact.constFinder:
        case Artifact.flutterFramework:
        case Artifact.flutterMacOSFramework:
        case Artifact.flutterTester:
        case Artifact.flutterXcframework:
        case Artifact.fontSubset:
  