{ inputs, config, ... }:
{
  imports = [ inputs.nix-gc-env.nixosModules.default ];

  config = {
    nix.gc = {
      automatic = true;
      dates = "weekly";

      # `delete_generations` added by nix-gc-env
      delete_generations = "+${builtins.toString config.boot.loader.systemd-boot.configurationLimit}";
    };

    boot = {
      loader = {
        grub = {
          enable = true;
          device = "/dev/sda";

          configurationLimit = 10;
        };
      };
    };
  };
}