generic: {
  v44 = generic {
    version = "4.4.5";
    sha256 = "1snhpqj5p16giplbxa6xfrsairnf0m1qdh378yrifbh6bf19ga4l";
  };

  v40 = generic {
    version = "4.0.17";
    sha256 = "0h699awyw3rhjkm1b84ld0sh7bbpvy4bplmcik36q1303sfrkw21";
  };

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