{ ... }: {
  flake.nixosModules.core = {
    time.timeZone = "Europe/Berlin";
    i18n.defaultLocale = "en_US.UTF-8";
    i18n.extraLocaleSettings = {
      LC_ADDRESS = "de_DE.UTF-8";
      LC_IDENTIFICATION = "de_DE.UTF-8";
      LC_MEASUREMENT = "de_DE.UTF-8";
      LC_MONETARY = "de_DE.UTF-8";
      LC_NAME = "de_DE.UTF-8";
      LC_NUMERIC = "de_DE.UTF-8";
      LC_PAPER = "de_DE.UTF-8";
      LC_TELEPHONE = "de_DE.UTF-8";
      LC_TIME = "de_DE.UTF-8";
    };
    security = {
      rtkit.enable = true;
      polkit.enable = true; # polkit
#      polkit.enablePkexecWrapper = true;
    };
    nix.settings.experimental-features = [
      "nix-command"
      "flakes"
    ];
  };
}