Add base nvidia conf for gaming

hardware-specific/nvidia.nix

@@ -0,0 +1,16 @@
+{ pkgs, ... }:
+{
+  hardware = {
+    nvidia = {
+      open = true; # Set to false to use the proprietary kernel module
+      forceFullCompositionPipeline = true;
+    };
+
+    graphics = {
+      enable = true;
+      extraPackages = with pkgs; [ nvidia-vaapi-driver ];
+    };
+  };
+
+  services.xserver.videoDrivers = [ "nvidia" ];
+}

machine-confs/gaming.nix

@@ -2,7 +2,10 @@
 {
   networking.hostName = "gaming";
 
-  imports = [ ../base.nix ];
+  imports = [
+    ../base.nix
+    ../hardware-specific/nvidia.nix
+  ];
 
   services.qemuGuest.enable = true;
 }