{
  ...
}:
{
  signing.enable = true;

  # apps.prebuilt = {
  #   whatsapp.apk = (pkgs.fetchurl {
  #     url = "https://d.apkpure.com/b/APK/com.whatsapp?versionCode=222403004";
  #     sha256 = "0000000000000000000000000000000000000000000000000000000000000000";
  #   });
  # };
}