nixos-config/hosts/penguin.nix

{ self, ... }: {
  perSystem = { self', pkgs, lib, ... }: {
    packages.penguin = self.lib.mkOpenwrtImage {
      inherit pkgs;
      hostname = "penguin";
      timezone = "Europe/Berlin";
      ipaddr = "192.168.0.1";
    };
  };
}