generic: {
  v44 = generic {
    version = "4.4.6";
    sha256 = "03mf4sklnw1x0ixp41vnibkz0794yi9jhws7ixld8jj2czk2ifr2";
  };

  v40 = generic {
    version = "4.0.18";
    sha256 = "105f0mifgm56dd1y8vychq8m2f2wx9a7gv380xv0hrs1q038i1ki";
  };

  v30 = generic {
    version = "3.0.30";
    sha256 = "0g2qw4ff02gsnmqza1cv9dq6bqyg7w9cdli6hsln07irf0hyrb07";
  };
}