nixos-config/modules/cups.nix

{ config, lib, pkgs, ... }:
let
  gutenprintWithVersion = "gutenprint.${lib.versions.majorMinor (lib.getVersion pkgs.gutenprint)}";
in
lib.mkIf config.sbruder.gui.enable {
  services = {
    printing = {
      enable = true;
      drivers = with pkgs; [
        gutenprint
      ] ++ lib.optional config.sbruder.unfree.allowSoftware (unstable.cups-kyocera-ecosys-m552x-p502x.override {
        # in Kyocera terms, EU means duplex enabled by default
        region = "EU";
      });
    };
    avahi.enable = true;
  };

  hardware.printers.ensurePrinters = [
    {
      name = "ich_drucke_nicht";
      deviceUri = "socket://192.168.178.26";
      model = "${gutenprintWithVersion}://bjc-TS3100-series/expert";
    }
  ] ++ lib.optionals config.sbruder.unfree.allowSoftware [
    {
      name = "elma";
      deviceUri = "socket://elma.home.sbruder.de";
      model = "Kyocera/Kyocera ECOSYS P5021cdn.PPD";
    }
  ];
}