[roles] No config change unless enabled

roles/audio/default.nix

@@ -10,7 +10,7 @@ in
     enable = mkEnableOption "Enable the audio role";
   };
 
-  config =
+  config = mkIf cfg.enable
     {
       environment.systemPackages = with pkgs; [
         paprefs

roles/bluetooth/default.nix

@@ -10,7 +10,7 @@ in
     enable = mkEnableOption "Enable the bluetooth role";
   };
 
-  config =
+  config = mkIf cfg.enable
     {
       hardware.bluetooth.enable = true;
       hardware.bluetooth.powerOnBoot = true;

roles/kodi/default.nix

@@ -25,7 +25,7 @@ in
       steam-library
       youtube
     ]);
-  in {
+  in mkIf cfg.enable {
     users.extraUsers.kodi.isNormalUser = true;
 
     networking.firewall = {

roles/nfs-mounts/default.nix

@@ -16,7 +16,8 @@ in
     };
   };
 
-  config = {
+  config = mkIf cfg.enable
+    {
       fileSystems."/media" = {
         device = "10.0.0.43:/media";
         fsType = "nfs";

roles/printing/default.nix

@@ -2,12 +2,16 @@
 
 with lib;
 
+let
+  cfg = config.roles.printing;
+in
 {
   options.roles.printing = {
     enable = mkEnableOption "Enable default printing setup";
   };
 
-  config = {
+  config = mkIf cfg.enable
+    {
       services.printing.enable = true;
 
       services.avahi = {

roles/spotifyd/default.nix

@@ -10,7 +10,8 @@ in
     enable = mkEnableOption "Enable the spotifyd role";
   };
 
-  config = {
+  config = mkIf cfg.enable
+    {
       roles.audio.enable = true;
 
       services.spotifyd = {

roles/users/default.nix

@@ -21,7 +21,7 @@ in
     kidsPackages = with pkgs; [
       firefox
     ];
-  in {
+  in mkIf cfg.enable {
     users.users.johno = {
       isNormalUser = true;
       description = "John Ogle";

roles/virtualisation/default.nix

@@ -2,12 +2,16 @@
 
 with lib;
 
+let
+  cfg = config.roles.virtualisation;
+in
 {
   options.roles.virtualisation = {
     enable = mkEnableOption "Enable virtualisation";
   };
 
-  config = {
+  config = mkIf cfg.enable
+    {
       virtualisation.libvirtd.enable = true;
       programs.virt-manager.enable = true;
     };