anchor.diff:  }:
   
   let
  -  v_major = "3.1";
  +  v_major = "3.1.1";
     version = "${v_major}-RELEASE";
     version_friendly = "${v_major}";
   
  
positive.code:     };
      pm = fetch {
        repo = "swift-package-manager";
        sha256 = "05zijald08z4jbppjawlc0h9n0i4dvn6jnhq0i5b9qq55l7a1lrk";
      };
      xctest = fetch {
        repo = "swift-corelibs-xctest";
  
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";
  