audio: add pavucontrol, paprefs and dconf

modules/audio.nix

@@ -17,8 +17,16 @@ in
       };
     };
 
+    environment.systemPackages = lib.mkIf config.services.xserver.enable (with pkgs; [
+      paprefs
+      pavucontrol
+    ]);
+
     hardware.pulseaudio.zeroconf.discovery.enable = true;
 
+    # required for paprefs to be able to save
+    programs.dconf.enable = lib.mkIf config.services.xserver.enable true;
+
     security.rtkit.enable = true;
 
     services = {