I use debian provided Qt5.15.8 into my qt opengl project.
I depends on libGL with usage of glxext
When I port my app to Qt6.7.1 with qt installer, I do not have libGL.so anymore.
It gives me libOpenGL.so which is not linked to glxext

In my cmakelists, I use find_package(OpenGL) and specify here OpenGL GL PREFERENCE to LEGACY in order to use always libGL.so

Any tips to force again my app to use libGL.so instead of libOpenGL.so with Qt6 ?