fix: set Qt6Qml_DIR for hyprland-qt-support cross-compile

flake.nix

@@ -120,6 +120,12 @@
                   gjs = prev.gjs.overrideAttrs (old: {
                     mesonFlags = (old.mesonFlags or []) ++ [ "-Dskip_gtk_tests=true" ];
                   });
+                  # hyprland-qt-support: Qt6Qml cross-compile path mismatch
+                  hyprland-qt-support = prev.hyprland-qt-support.overrideAttrs (old: {
+                    cmakeFlags = (old.cmakeFlags or []) ++ [
+                      "-DQt6Qml_DIR=${prev.qtdeclarative.dev}/lib/cmake/Qt6Qml"
+                    ];
+                  });
                 })
               ];
             }