generic: {
  v50 = generic {
    version = "5.0.4";
    sha256 = "0ivigwqcdfzx58vx5crixjsr4fh8l4bcf1wvnpf6xg46p0zninn1";
  };

  v40 = generic {
    version = "4.0.25";
    sha256 = "1w9k0pw3w0klpzw7ny8igv5a97icv2jl4xicbgyr5464if8sw9ck";
  };

  v30 = generic {
    version = "3.0.31";
    sha256 = "0a2jznpmg24lqdqbc9p8i2q6jkz0hx53hh6q12xsvvmq48vi3snm";
  };
}