generic: {
  v42 = generic {
    version = "4.2.5";
    sha256 = "135bfafydmd66q97za84micymgf38s9zydp6jssrf7azik699fjd";
  };

  v40 = generic {
    version = "4.0.11";
    sha256 = "02c4c82vbc27v09rci7flvwvjyb5sx0mknw0fz5i8bb23k1jbbxh";
  };

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