add networkmanager to fix steam startup times

modules/nixos/hardware/networking.nix

@@ -2,7 +2,7 @@
 
   config = lib.mkIf config.physical {
 
-    networking.useDHCP = true;
+    networking.useDHCP = !config.networking.networkmanager.enable;
 
     networking.firewall.allowPing = lib.mkIf config.server true;
 

modules/nixos/hardware/wifi.nix

@@ -3,7 +3,7 @@
   config = lib.mkIf (config.physical && pkgs.stdenv.isLinux) {
 
     # Enables wireless support via wpa_supplicant.
-    networking.wireless.enable = true;
+    networking.wireless.enable = !config.networking.networkmanager.enable;
 
     # Allows the user to control the WiFi settings.
     networking.wireless.userControlled.enable = true;