nixos/modules/hardware/id-card/default.nix

{ config, lib, ... }:
let
  cfg = config.my.hardware.id-card;
in
{
  options.my.hardware.id-card = {
    enable = lib.mkEnableOption "german id card authentication";
  };

  config = lib.mkIf cfg.enable {
    programs.ausweisapp = {
      enable = true;
      openFirewall = true;
    };
  };
}