diff --git a/pkgs/development/libraries/qt-6/modules/qtbase.nix b/pkgs/development/libraries/qt-6/modules/qtbase.nix
index 592ca15bcab9..0babdbc6094c 100644
--- a/pkgs/development/libraries/qt-6/modules/qtbase.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtbase.nix
@@ -212,6 +212,7 @@ stdenv.mkDerivation rec {
   qtQmlPrefix = "lib/qt-6/qml";
 
   cmakeFlags = [
+    "-DQT_EMBED_TOOLCHAIN_COMPILER=OFF"
     "-DINSTALL_PLUGINSDIR=${qtPluginPrefix}"
     "-DINSTALL_QMLDIR=${qtQmlPrefix}"
     "-DQT_FEATURE_libproxy=ON"