pythonPackages.pyside6: add egg_info

pkgs/development/python-modules/pyside6/default.nix

@@ -36,6 +36,9 @@ stdenv.mkDerivation rec {
   buildInputs = with python.pkgs.qt6; [
     # required
     qtbase
+    python.pkgs.ninja
+    python.pkgs.packaging
+    python.pkgs.setuptools
   ] ++ lib.optionals stdenv.isLinux [
     # optional
     qt3d
@@ -68,6 +71,12 @@ stdenv.mkDerivation rec {
 
   dontWrapQtApps = true;
 
+  postInstall = ''
+    cd ../../..
+    ${python.pythonForBuild.interpreter} setup.py egg_info --build-type=pyside6
+    cp -r PySide6.egg-info $out/${python.sitePackages}/
+  '';
+
   meta = with lib; {
     description = "Python bindings for Qt";
     license = with licenses; [ lgpl3Only gpl2Only gpl3Only ];