{stdenv, fetchurl}:

stdenv.mkDerivation {
  name = "renderext-0.9";
  src = fetchurl {
    url = http://nix.cs.uu.nl/dist/tarballs/renderext-0.9.tar.bz2;
    md5 = "d43c2afc69937655d13c02588c9ff974";
  };
}