anchor.diff:      # For more inforation, see: https://github.com/apple/swift/pull/3594#issuecomment-234169759
       clang = fetch {
         repo = "swift-clang";
  -      sha256 = "0820mx1ghfnk4p5595r1f313y1699jwi61zghfbwak5wgwgy7n4x";
  +      sha256 = "1gmdgr8jph87nya8cgdl7iwrggbji2sag996m27hkbszw4nxy8sd";
       };
       llvm = fetch {
         repo = "swift-llvm";
  -      sha256 = "0zb1zi77b2xdz5szlz2m3j3d92dc0q00dv8py2s6iaq3k435i3sq";
  +      sha256 = "0nwd7cp6mbj7f6a2rx8123n7ygs8406hsx7hp7ybagww6v75bwzi";
       };
       compilerrt = fetch {
         repo = "swift-compiler-rt";
  
positive.code:     };
      pm = fetch {
        repo = "swift-package-manager";
        sha256 = "05zijald08z4jbppjawlc0h9n0i4dvn6jnhq0i5b9qq55l7a1lrk";
      };
      xctest = fetch {
        repo = "swift-corelibs-xctest";
  
negative.code: }:
  
  let
    v_major = "3.1.1";
    version = "${v_major}-RELEASE";
    version_friendly = "${v_major}";
  
  