generic: {
  v44 = generic {
    version = "4.4.3";
    sha256 = "1rpkgimi9kv9zrcis1zwbrny7yzralick206n71i8071hf95jvwx";
  };

  v40 = generic {
    version = "4.0.15";
    sha256 = "19q8h79h7lnsq6gbd0awrlw59scg92x0a1375kd2av6bjpx8r0y9";
  };

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