nixpkgs/pkgs/tools/system/foreman/gemset.nix

{
  thor = {
    version = "0.19.1";
    source = {
      type = "gem";
      remotes = ["https://rubygems.org"];
      sha256 = "08p5gx18yrbnwc6xc0mxvsfaxzgy2y9i78xq7ds0qmdm67q39y4z";
    };
  };
  foreman = {
    version = "0.78.0";
    source = {
      type = "gem";
      remotes = ["https://rubygems.org"];
      sha256 = "1caz8mi7gq1hs4l1flcyyw1iw1bdvdbhppsvy12akr01k3s17xaq";
    };
  };
}