anchor.diff:  { stdenv, fetchFromGitHub, docutils, python }:
   
   let version = "0.9.0"; in
  -stdenv.mkDerivation {
  +stdenv.mkDerivation rec {
     name = "git-hub-${version}";
   
     src = fetchFromGitHub {
  
positive.code:     rev = "v${version}";
      repo = "git-hub";
      owner = "sociomantic";
    };
  
    meta = with stdenv.lib; {
      inherit version;
      description = "Git command line interface to GitHub";
      longDescription = ''
        A simple command line interface to GitHub, enabling most useful GitHub
        tasks (like creating and listing pull request or issues) to be accessed
        directly through the Git command line.
      '';
      homepage = https://github.com/sociomantic/git-hub;
      license = licenses.gpl3Plus;
      platforms = with platforms; linux;
      maintainers = with maintainers; [ nckx ];
    };
  
    buildInputs = [ python ];
  
negative.code:     # Remove inert ftdetect vim plugin and a README that's a man page subset:
      rm -r $out/share/{doc,vim}
    '';
  
    meta = with stdenv.lib; {
      inherit version;
      inherit (src.meta) homepage;
      description = "Git command line interface to GitHub";
      longDescription = ''
        A simple command line interface to GitHub, enabling most useful GitHub
        tasks (like creating and listing pull request or issues) to be accessed
        directly through the Git command line.
      '';
      license = licenses.gpl3Plus;
      platforms = platforms.linux;
      maintainers = with maintainers; [ nckx ];
    };
  }
  