{ lib, ... }: rec {
  _file = ./format-module.nix;
  # This deliberate key makes sure this module will be deduplicated
  # regardless of the accessor path: either via flake's nixosModule
  # or as part of the nixos-generate command. These two store paths
  # of the module may differ and hence don't serve as a key
  key = "github:nix-community/nixos-generators/format-module.nix";

  options = {
    filename = lib.mkOption {
      type = lib.types.str;
      description = "Declare the path of the wanted file in the output directory";
      default = "*";
    };
    formatAttr = lib.mkOption {
      type = lib.types.str;
      description = "Declare the default attribute to build";
    };
  };
}