{ ... }: {
  flake.nixosModules.core = {
    hardware.bluetooth = {
      enable = true;
      powerOnBoot = false;
      input.General.ClassicBondedOnly = false;
      settings = {
        General = {
          Experimental = true;
        };
      };
    };
    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;
    };
    networking.networkmanager.enable = true;
    nix.settings.experimental-features = [
      "nix-command"
      "flakes"
    ];
  };
}