{
  lib,
  moduleLocation,
  ...
}:
let
  inherit (lib)
    mapAttrs
    mkOption
    types
    ;
in
{
  # Currently, there's no nix-darwin module for flake-parts,
  # so we have to manually add flake.darwinModules.
  # The flake.darwinConfigurations as already been added to nix-darwin.
  options.flake.darwinModules = mkOption {
    type = types.lazyAttrsOf types.deferredModule;
    default = { };
    apply = mapAttrs (
      k: v: {
        _file = "${toString moduleLocation}#darwinModules.${k}";
        imports = [ v ];
      }
    );
    description = ''
      nix-darwin modules.

      You may use this for reusable pieces of configuration, service modules, etc.
    '';
  };
}