{ config, lib, pkgs, ... }:
{
  options = {
    packages = lib.mkOption {
      type = lib.types.attrsOf lib.types.package;
      default = pkgs.mkShell {};
    };
    outputs.packages = lib.mkOption {
      type = lib.types.package;
    };
  };
  config.outputs = { inherit (config) packages; };
}