generic: {
  v44 = generic {
    version = "4.4.4";
    sha256 = "0pw66zd89w0i9365zkwn6vihx9bdzsmg7f91hd7zzm42s7kyvxvv";
  };

  v40 = generic {
    version = "4.0.16";
    sha256 = "0hjdvi0cwr9qczmkvnmmd22828hv5c587xcszp9pnap6621f3mx8";
  };

  v30 = generic {
    version = "3.0.29";
    sha256 = "1d81w68hnkjdj1a00iasg6aidw25syi4lrbsiyc98pdihmxbpiky";
  };
}