anchor.diff:      gobject-introspection
       gtk3
       json-glib
  -    python
  +    pythonPackages.python
       pythonPackages.rdflib
       raptor2
       sqlite
  
positive.code:   inherit (stdenv.lib)
      boolEn;
  
    versionMajor = "1.0";
    versionMinor = "";
    version = "${versionMajor}"; #.${versionMinor}";
  in
  stdenv.mkDerivation rec {
    name = "zeitgeist-${version}";
  
    src = fetchurl {
      url = "https://launchpad.net/zeitgeist/${versionMajor}/${version}/"
        + "+download/${name}.tar.xz";
      sha256 = "5ff508508f7a7b46acc9fbf1cf73fecb1aec214e18d9d22325aae8c2c2e8ddc8";
    };
  
    nativeBuildInputs = [
  
negative.code: , gobject-introspection
  , gtk3
  , json-glib
  , pythonPackages
  , raptor2
  , sqlite
  