audio-server: reduce GUI dependencies, resolve dependenices

modules/audio-server.nix

@@ -61,7 +61,8 @@ in
 
       systemPackages = with pkgs; [
         mpd
-        mpv
+        # draws in mesa
+        (wrapMpv (mpv-unwrapped.override { drmSupport = false; }) { })
         ncmpcpp
         ncpamixer
         pulseaudio # required for pactl
@@ -161,7 +162,7 @@ in
     # tell Avahi to publish services like Pipewire/PulseAudio
     services.avahi = {
       enable = true;
-      nssmdns = true;
+      nssmdns4 = true;
       publish = {
         enable = true;
         addresses = true;