feat: move system-config-printer to user space

hosts/W530/default.nix

@@ -13,6 +13,7 @@
     nvidia.enable = false;
     audio.enable = true;
     bluetooth.enable = true;
+    printing.enable = true;
     vpn.enable = true;
 
     devenv.enable = true;

modules/default.nix

@@ -27,6 +27,10 @@
       enable = mkEnableOption "bluetooth";
     };
 
+    printing = {
+      enable = mkEnableOption "printing";
+    };
+
     vpn = {
       enable = mkEnableOption "vpn";
     };

modules/printing.nix

@@ -1,5 +1,4 @@
-{ pkgs, config, ... }: {
+{ pkgs, lib, config, ... }: lib.mkIf config.bchmnn.printing.enable {
-  # Enable CUPS to print documents.
   services.printing = {
     enable = true;
     drivers = [
@@ -24,8 +23,4 @@
     ];
     ensureDefaultPrinter = "Brother-MFC-L3750CDW-series";
   };
-
-  environment.systemPackages = with pkgs; with config.bchmnn; lib.optionals (gui.enable) [
-    system-config-printer
-  ];
 }

users/gandalf/modules/gui/programs/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, ... }: {
+{ pkgs, lib, nixosConfig, ... }: {
 
   imports = [
     ./alacritty.nix
@@ -19,6 +19,8 @@
     gnome.simple-scan
     telegram-desktop
     signal-desktop
+  ] ++ lib.optionals nixosConfig.bchmnn.printing.enable [
+    system-config-printer
   ];
 
 }