{
  # The first few arguments are implicitly passed by the 'close' helper
  lib,
  pkgs,
  doctrine,
  name,
  config,
  hm ? null,
  sys ? null,
  options ? null,
  requires ? [],
  prefix ? doctrine.prefix,
  namespace ? doctrine.namespace,
}: let
  optionsSet = import options {
    inherit config lib pkgs cfg name doctrine;
  };

  configSet = import configFiles.${namespace} {
    inherit config lib pkgs doctrine cfg;
  };

  configFiles = lib.filterAttrs (k: v: v != null) {
    inherit sys hm;
  };

  cfg = config.${prefix}.${name};
in {
  config =
    lib.optionalAttrs (configFiles ? ${namespace})
    (lib.mkIf cfg.enable (lib.mkMerge [
      configSet
      {
        assertions =
          map (dependency: {
            assertion = cfg.enable -> config.${prefix}.${dependency}.enable;
            message = "${prefix}.${name}.enable requires ${prefix}.${dependency}.enable";
          })
          requires;
      }
    ]));

  options.${prefix}.${name} =
    lib.optionalAttrs (options != null && optionsSet ? ${namespace}) optionsSet.${namespace}
    // {
      enable = lib.mkEnableOption name;
    };
}