try to make nvidia module toogleable

hosts/desktop1/configuration.nix

@@ -9,6 +9,8 @@
       ../../modules/nix/virt.nix
     ];
 
+  smayzy.nvidia.enable = true;
+
   home-manager = {
     extraSpecialArgs = { inherit inputs; };
     users = {

modules/nix/nvidia.nix

@@ -1,10 +1,21 @@
 { config, lib, pkgs, ... }:
+let
+  inherit (lib) mkIf mkOption types;
+in
 {
-  services.xserver.videoDrivers = [ "nvidia" ];
+  options.smayzy.nvidia.enable = mkOption {
-  hardware.nvidia = {
+    type = types.bool;
-    modesetting.enable = true;
+    default = false;
-    open = true;
+    description = "set to true if you want to use a nvidia GC";
-    nvidiaSettings = true;
+  };
-    package = config.boot.kernelPackages.nvidiaPackages.stable;
+
+  config = mkIf config.smayzy.nvidia.enable {
+    services.xserver.videoDrivers = [ "nvidia" ];
+    hardware.nvidia = {
+      modesetting.enable = true;
+      open = true;
+      nvidiaSettings = true;
+      package = config.boot.kernelPackages.nvidiaPackages.stable;
+    };
   };
 }