syncplay: Switch to PySide6 and Qt6

Syncplay now works on macOS 🎉

pkgs/applications/networking/syncplay/default.nix

@@ -1,4 +1,14 @@
-{ lib, fetchFromGitHub, buildPythonApplication, pyside2, twisted, certifi, qt5, enableGUI ? true }:
+{ lib
+, stdenv
+, fetchFromGitHub
+, buildPythonApplication
+, pyside6
+, twisted
+, certifi
+, qt6
+, appnope
+, enableGUI ? true
+}:
 
 buildPythonApplication rec {
   pname = "syncplay";
@@ -13,11 +23,12 @@ buildPythonApplication rec {
     sha256 = "sha256-Te81yOv3D6M6aMfC5XrM6/I6BlMdlY1yRk1RRJa9Mxg=";
   };
 
-  buildInputs = lib.optionals enableGUI [ qt5.qtwayland ];
+  buildInputs = lib.optionals enableGUI [ (if stdenv.isLinux then qt6.qtwayland else qt6.qtbase) ];
   propagatedBuildInputs = [ twisted certifi ]
     ++ twisted.optional-dependencies.tls
-    ++ lib.optional enableGUI pyside2;
-  nativeBuildInputs = lib.optionals enableGUI [ qt5.wrapQtAppsHook ];
+    ++ lib.optional enableGUI pyside6
+    ++ lib.optional (stdenv.isDarwin && enableGUI) appnope;
+  nativeBuildInputs = lib.optionals enableGUI [ qt6.wrapQtAppsHook ];
 
   makeFlags = [ "DESTDIR=" "PREFIX=$(out)" ];
 
@@ -29,7 +40,7 @@ buildPythonApplication rec {
     homepage = "https://syncplay.pl/";
     description = "Free software that synchronises media players";
     license = licenses.asl20;
-    platforms = platforms.linux;
+    platforms = platforms.linux ++ platforms.darwin;
     maintainers = with maintainers; [ Enzime ];
   };
 }