nixpkgs/pkgs/development/tools/puppet/puppet-lint/gemset.nix

{
  puppet-lint = {
    groups = ["default"];
    platforms = [];
    source = {
      remotes = ["https://rubygems.org"];
      sha256 = "1rcj3cb6lf90g6vvhh3c9p8yn7pgibglf9k5878bzd6pn5ag0h9v";
      type = "gem";
    };
    version = "2.5.2";
  };
}