nixpkgs/pkgs/development/compilers/crystal2nix/shards.nix

{
  spectator = {
    url = "https://gitlab.com/arctic-fox/spectator.git";
    rev = "v0.10.5";
    sha256 = "1fgjz5vg59h4m25v4fjklimcdn62ngqbchm00kw1160ggjpgpzw2";
  };
  version_from_shard = {
    url = "https://github.com/hugopl/version_from_shard.git";
    rev = "v1.2.5";
    sha256 = "0xizj0q4rd541rwjbx04cjifc2gfx4l5v6q2y7gmd0ndjmkgb8ik";
  };
}