nixpkgs/pkgs/applications/networking/wayback_machine_downloader/gemset.nix

{
  wayback_machine_downloader = {
    groups = ["default"];
    platforms = [];
    source = {
      remotes = ["https://rubygems.org"];
      sha256 = "170426sashqc2k2angg8d0bhs7spi1x1isv6cyk2hif0l6xxm3cm";
      type = "gem";
    };
    version = "2.3.1";
  };
}