mpd: fix-build on darwin

pkgs/servers/mpd/default.nix

@@ -82,7 +82,7 @@ let
       # Disable platform specific features if needed
       # using libmad to decode mp3 files on darwin is causing a segfault -- there
       # is probably a solution, but I'm disabling it for now
-      platformMask = lib.optionals stdenv.isDarwin [ "mad" "pulse" "jack" "nfs" "smb" ]
+      platformMask = lib.optionals stdenv.isDarwin [ "mad" "pulse" "jack" "nfs" "smbclient" ]
                   ++ lib.optionals (!stdenv.isLinux) [ "alsa" "systemd" "syslog" ];
 
       knownFeatures = builtins.attrNames featureDependencies;
@@ -113,7 +113,7 @@ let
 
       buildInputs = [ glib boost ]
         ++ (lib.concatLists (lib.attrVals features_ featureDependencies))
-        ++ lib.optional stdenv.isDarwin darwin.apple_sdk.frameworks.AudioToolbox;
+        ++ lib.optionals stdenv.isDarwin [ darwin.apple_sdk.frameworks.AudioToolbox darwin.apple_sdk.frameworks.AudioUnit ];
 
       nativeBuildInputs = [ meson ninja pkgconfig ];