anchor.diff:      };
       pm = fetch {
         repo = "swift-package-manager";
  -      sha256 = "05zijald08z4jbppjawlc0h9n0i4dvn6jnhq0i5b9qq55l7a1lrk";
  +      sha256 = "1ayy5vk3mjk354pg9bf68wvnaj3jymx23w0qnlw1jxz256ff8fwi";
       };
       xctest = fetch {
         repo = "swift-corelibs-xctest";
  
positive.code:     };
      foundation = fetch {
        repo = "swift-corelibs-foundation";
        sha256 = "0d34clr7n0kfy0l94hmgg1cailg3bml0qzlhy8wh75hrrv3n4g1v";
      };
      libdispatch = fetch {
        repo = "swift-corelibs-libdispatch";
        sha256 = "1rka7ijkdk4ybdvyk3map5mc1fm79v848v9nhpfq75m5i63r61bh";
        fetchSubmodules = true;
      };
      swift = fetch {
        repo = "swift";
        sha256 = "172q84z70z9gpwahmlcifihldrvc3cafy9ajbz4wi5f6ncw7wbmb";
      };
    };
  
  
negative.code:     # For more inforation, see: https://github.com/apple/swift/pull/3594#issuecomment-234169759
      clang = fetch {
        repo = "swift-clang";
        sha256 = "1gmdgr8jph87nya8cgdl7iwrggbji2sag996m27hkbszw4nxy8sd";
      };
      llvm = fetch {
        repo = "swift-llvm";
        sha256 = "0nwd7cp6mbj7f6a2rx8123n7ygs8406hsx7hp7ybagww6v75bwzi";
      };
      compilerrt = fetch {
        repo = "swift-compiler-rt";
  