# Pastebin gC4WXFVT
  projects = (fromJSON ( readFile "${goDeps}/Gopkg.json" )).projects;

  projectSources = map (project:
    pkgs.stdenv.mkDerivation {
      name = replaceStrings ["/"] ["-"] project.name;
      src = fetchGit {
        url = (if ( hasPrefix "golang.org" project.name ) then
          "https://go.googlesource.com/" + ( elemAt (splitString "/" project.name) 2 )
        else
          "https://" + project.name);
        rev = project.revision;
      } // (if project?branch then { ref = project.branch; } else {});
      phases = "buildPhase";
      buildPhase = ''
        mkdir -p $out/package
        cp -r $src/* $out/package
        echo "${project.name}" > $out/name
      '';
    }
  ) projects;

  goDeps = pkgs.stdenv.mkDerivation {
    name = "goDeps";
    src = ./Gopkg.lock;
    phases = "buildPhase";
    buildInputs = [ pkgs.remarshal ];
    buildPhase = ''
      mkdir -p $out;
      remarshal --indent-json -if toml -i $src -of json -o $out/Gopkg.json
    '';
  };