another one

system/etc/graphics/amd/default.nix

@@ -0,0 +1,27 @@
+{pkgs, ...}: {
+  hardware = {
+    graphics = {
+      enable = true;
+      enable32Bit = true;
+      extraPackages = with pkgs; [
+        libva
+        vaapiVdpau
+        libvdpau-va-gl
+        amdvlk
+
+        # mesa
+        mesa
+
+        # vulkan
+        vulkan-tools
+        vulkan-loader
+        vulkan-validation-layers
+        vulkan-extension-layer
+      ];
+      extraPackages32 = with pkgs.pkgsi686Linux; [
+        vaapiVdpau
+        libvdpau-va-gl
+      ];
+    };
+  };
+}

system/etc/graphics/nvidia/default.nix

@@ -0,0 +1,30 @@
+{
+  pkgs,
+  config,
+  ...
+}: {
+  hardware = {
+    graphics = {
+      enable = true;
+      enable32Bit = true;
+      extraPackages = with pkgs; [
+        libva
+        vaapiVdpau
+        libvdpau-va-gl
+        intel-media-driver
+        nvidia-vaapi-driver
+      ];
+    };
+    nvidia = {
+      package = config.boot.kernelPackages.nvidiaPackages.beta;
+      # package = config.boot.kernelPackages.nvidiaPackages.stable;
+      modesetting.enable = true;
+      powerManagement = {
+        enable = false;
+        finegrained = false;
+      };
+      open = false;
+      nvidiaSettings = true;
+    };
+  };
+}