set up printing

nixos/common/default.nix

@@ -4,6 +4,7 @@
     ./audio.nix
     ./tailscale.nix
     ./bluetooth.nix
+    ./printing.nix
   ];
 
   # use nix version 2.22

nixos/common/printing.nix

@@ -0,0 +1,10 @@
+{ ... }:
+{
+  services.printing.enable = true;
+
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    openFirewall = true;
+  };
+}

nixos/desktop/plasma.nix

@@ -1,6 +1,10 @@
-{ ... }:
+{ pkgs, ... }:
 {
   services.displayManager.sddm.enable = true;
   services.displayManager.sddm.wayland.enable = true;
   services.desktopManager.plasma6.enable = true;
+
+  environment.systemPackages = with pkgs; [
+    system-config-printer
+  ];
 }