generic: {
  v42 = generic {
    version = "4.2.3";
    sha256 = "0865c1a9vcgg4syhp5133rw9v1h65lp0g1y2f758jb9x9ybrr01s";
  };

  v40 = generic {
    version = "4.0.9";
    sha256 = "1lc4wx3cing5w2qa18yb6232qd70hrfjq7jmnx4ip3nawnswj2xa";
  };

  v30 = generic {
    version = "3.0.28";
    sha256 = "16966danf5ww4lhjg5gx5bnpid8abxh2ymdg6k5mymrman5bcdjj";
  };
}