nixpkgs/pkgs/development/tools/scry/shards.nix

{
  json_mapping = {
    owner = "crystal-lang";
    repo = "json_mapping.cr";
    rev = "v0.1.0";
    sha256 = "1qq5vs2085x7cwmp96rrjns0yz9kiz1lycxynfbz5psxll6b8p55";
  };
  lsp = {
    owner = "crystal-lang-tools";
    repo = "lsp";
    rev = "v0.2.0";
    sha256 = "1lnviqrywh0w05mx67mzw7d1qz328p52z4k69pcqw66gs44i7b5c";
  };
}