Add OpenGL support

configuration.nix

@@ -1,19 +1,14 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
 # Nix Reference Manual:  
 # https://nixos.org/manual/nix/stable/
 # NixOS Packages / Options:
 # https://search.nixos.org/packages?
 
-# Other things to consider:
-#   Telegraf 
 
 { lib, config, pkgs, ... }: {
   imports =
     [ 
       # Desktop Environments
+      ./desktops/common.nix
       ./desktops/gnome.nix
       
       # Software
@@ -91,30 +86,11 @@
     LC_TIME = "en_US.UTF-8";
   };
 
-  # Enable sound with pipewire.
-  sound.enable = true;
-  hardware.pulseaudio.enable = false;
-  security.rtkit.enable = true;
-  services.pipewire = {
-    enable = true;
-    alsa.enable = true;
-    alsa.support32Bit = true;
-    pulse.enable = true;
-  };
-
   # Define a user account. Don't forget to set a password with ‘passwd’.
   users.users.albert = {
     isNormalUser = true;
     description = "Albert J. Copeland";
     extraGroups = [ "networkmanager" "wheel" ];
-    packages = with pkgs; [
-      firefox
-      bitwarden
-      steam
-      lutris
-      vlc
-      vscodium
-    ];
   };
 
   # Allow unfree packages 

desktops/common.nix

@@ -0,0 +1,40 @@
+# If a GUI is enabled, install GUI apps:
+{ lib, pkgs, config, ... }: {
+  users.users.albert = {
+    packages = with pkgs; [
+      firefox
+      bitwarden
+      steam
+      lutris
+      vlc
+      vscodium
+    ];
+  };
+
+  # Enable sound with pipewire.
+  sound.enable = true;
+  hardware.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+  };
+
+  # Configure keymap in X11
+  services.xserver = {
+    enable = true;
+    layout = "us";
+    xkbVariant = "";
+    libinput = {
+      enable = true;
+      touchpad.tapping = true;
+    };
+    
+    # Enable nVidia drivers
+    videoDrivers = [ "nvidia" ];
+    autorun = true;
+  };
+
+}

flake.nix

@@ -54,7 +54,7 @@
         modules = [
           # Configuration Imports
           ./hosts/${hostname}/hardware-configuration.nix # Hardware Configuration
-          ./hosts/${hostname}/configuration.nix          # Extra options for the host hardware configuration
+          ./hosts/${hostname}/configuration.nix          # Extra options for the host configuration
           ./configuration.nix                            # Common NixOS Configuration
 
           # Flake Imports

hosts/nixos-laptop/configuration.nix

@@ -22,13 +22,16 @@
     tod.driver = pkgs.libfprint-2-tod1-vfs0090;
   };
 
-  # Enable nVidia PRIME Render Offload
+  # Enable nVidia PRIME Render Offload and OpenGL
   # https://github.com/NixOS/nixos-hardware/blob/master/lenovo/thinkpad/p1/3th-gen/nvidia.nix
-  hardware.nvidia.prime = {
-    # Bus ID of the Intel GPU.
-    intelBusId = lib.mkDefault "PCI:0:2:0";
-    # Bus ID of the NVIDIA GPU.
-    nvidiaBusId = lib.mkDefault "PCI:1:0:0";
+  hardware = {
+    opengl.enable = true;
+    opengl.driSupport32Bit = true;
+
+    nvidia.prime = {
+      intelBusId = lib.mkDefault "PCI:0:2:0";
+      nvidiaBusId = lib.mkDefault "PCI:1:0:0";
+    };
   };
 
   # Fingerprint software
@@ -36,7 +39,6 @@
 
   imports = [
       # Modules
-      ../../modules/xserver.nix 
       ../../modules/powertop.nix
   ];
 }

modules/xserver.nix

@@ -1,15 +0,0 @@
-{ lib, config, pkgs, ... }: {
-  # Configure keymap in X11
-  services.xserver = {
-    enable = true;
-    layout = "us";
-    xkbVariant = "";
-    libinput = {
-      enable = true;
-      touchpad.tapping = true;
-    };
-    # Enable nVidia drivers
-    videoDrivers = [ "nvidia" ];
-    autorun = true;
-  };
-}