anchor.diff:      };
   
       ghc8107Binary = callPackage ../development/compilers/ghc/8.10.7-binary.nix {
  -      llvmPackages = pkgs.llvmPackages_11;
  +      llvmPackages = pkgs.llvmPackages_12;
       };
   
       ghc8107BinaryMinimal = callPackage ../development/compilers/ghc/8.10.7-binary.nix {
  -      llvmPackages = pkgs.llvmPackages_11;
  +      llvmPackages = pkgs.llvmPackages_12;
         minimal = true;
       };
   
  
positive.code:       # https://github.com/xattr/xattr/issues/44 and
        # https://github.com/xattr/xattr/issues/55 are solved.
        inherit (buildPackages.darwin) xattr autoSignDarwinBinariesHook;
        buildLlvmPackages = buildPackages.llvmPackages_9;
        llvmPackages = pkgs.llvmPackages_9;
      };
      ghc901 = callPackage ../development/compilers/ghc/9.0.1.nix {
        bootPkgs =
  
negative.code:       # https://github.com/xattr/xattr/issues/44 and
        # https://github.com/xattr/xattr/issues/55 are solved.
        inherit (buildPackages.darwin) xattr autoSignDarwinBinariesHook;
        buildLlvmPackages = buildPackages.llvmPackages_12;
        llvmPackages = pkgs.llvmPackages_12;
        libffi = pkgs.libffi;
      };
  
  