anchor.diff:  
   buildGoPackage rec {
     pname = "buildah";
  -  version = "1.12.0";
  +  version = "1.13.1";
   
     src = fetchFromGitHub {
       owner  = "containers";
       repo   = "buildah";
       rev    = "v${version}";
  -    sha256 = "0lsjsfp6ls38vlgibbnsyd1m7jvmjwdmpyrd0qigp4aa2abwi4dg";
  +    sha256 = "0swhpdr970ik6fhvmj45r84lsp1n6rxm0bgv9i1lvrxy1mdv7r9x";
     };
   
     outputs = [ "bin" "man" "out" ];
   
     goPackagePath = "github.com/containers/buildah";
     excludedPackages = [ "tests" ];
  -
  -  # Disable module-mode, because Go 1.13 automatically enables it if there is
  -  # go.mod file. Remove after https://github.com/NixOS/nixpkgs/pull/73380
  -  GO111MODULE = "off";
   
     nativeBuildInputs = [ pkgconfig ];
     buildInputs = [ gpgme libgpgerror lvm2 btrfs-progs ostree libselinux libseccomp ];
  
positive.code:     pushd go/src/${goPackagePath}
      make GIT_COMMIT="unknown"
      install -Dm755 buildah $bin/bin/buildah
    '';
  
    postBuild = ''
  
negative.code:   meta = with stdenv.lib; {
      description = "A tool which facilitates building OCI images";
      homepage = "https://github.com/containers/buildah";
      changelog = "https://github.com/containers/buildah/releases/tag/v${version}";
      license = licenses.asl20;
      maintainers = with maintainers; [ Profpatsch vdemeester saschagrunert ];
    };
  