fix pyside6 not building

flake.nix

       });
 
       devShells = forAllSystems (system: let
-        inherit (poetry2nix.lib.mkPoetry2Nix { pkgs = pkgs.${system}; }) mkPoetryEnv;
+        inherit (poetry2nix.lib.mkPoetry2Nix { pkgs = pkgs.${system}; }) mkPoetryEnv overrides;
       in {
         default = pkgs.${system}.mkShellNoCC {
           packages = with pkgs.${system}; [
             (mkPoetryEnv {
               projectDir = self;
               extraPackages = ps: [ ps.black ps.pyside6 ps.dbus-python ];
+              overrides = overrides.withDefaults
+              (pyfinal: pyprev: {
+                pyside6 = pyfinal.pkgs.python3.pkgs.pyside6;
+                shiboken6 = pyfinal.pkgs.python3.pkgs.shiboken6;
+                pyqt6 = pyfinal.pkgs.python3.pkgs.pyqt6;
+                pyqt6-sip = pyfinal.pkgs.python3.pkgs.pyqt6-sip;
+              });
             })
             poetry
             mypy