anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "git-cinnabar";
  -  version = "0.5.4";
  +  version = "0.5.6";
   
     src = fetchFromGitHub {
       owner = "glandium";
       repo = "git-cinnabar";
       rev = version;
  -    sha256 = "1cjn2cc6mj4m736wxab9s6qx83p5n5ha8cr3x84s9ra6rxs8d7pi";
  +    sha256 = "1wbp4xqpkaqhhkjw8rbbsagwiciqffacqqbm4j49q41mlk371ai3";
       fetchSubmodules = true;
     };
   
  
positive.code:             --prefix GIT_CINNABAR_EXPERIMENTS , python3 \
              --set PYTHONPATH ${mercurial}/${python3.sitePackages}
      done
    '';
  
    meta = with lib; {
      homepage = "https://github.com/glandium/git-cinnabar";
      description = "git remote helper to interact with mercurial repositories";
      license = licenses.gpl2;
      maintainers = with maintainers; [ qyliss ];
      platforms = platforms.all;
    };
  
negative.code:   enableParallelBuilding = true;
  
    installPhase = ''
      runHook preInstall
  
      mkdir -p $out/bin $out/libexec
      install git-cinnabar-helper $out/bin
      install git-cinnabar git-remote-hg $out/libexec
  