small update

global/system-configuration.nix

@@ -1,4 +1,13 @@
-{ pkgs, lib, ... }: {
+{ pkgs, lib, ... }:
+let
+  intel-driver = (
+    if (lib.versionOlder (lib.versions.majorMinor lib.version) "23.11") then
+      pkgs.vaapiIntel
+    else
+      pkgs.intel-vaapi-driver
+  );
+in
+{
   sound.enable = true;
   networking.networkmanager.enable = true;
   time.timeZone = "Asia/Shanghai";
@@ -8,17 +17,11 @@
   hardware = {
     opengl = {
       enable = true;
-      extraPackages = with pkgs; [
-        mesa.drivers
-        libvdpau-va-gl
-        vaapiVdpau
-
-        (
-          if (lib.versionOlder (lib.versions.majorMinor lib.version) "23.11") then
-            vaapiIntel
-          else
-            intel-vaapi-driver
-        )
+      extraPackages = [
+        pkgs.mesa.drivers
+        pkgs.libvdpau-va-gl
+        pkgs.vaapiVdpau
+        intel-driver
       ];
     };
   };