Qt Design Studio cmake build failed (unknown CMake command "qt_internal_add_qml_module")

[dpoblaci]

I'm trying to build a Qt Design Studio project with CMake but, when it's doing the configuration step, I get the following error:

Building designer components.
-- The C compiler identification is GNU 11.4.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Error at build/_deps/ds-src/src/imports/compat/Extras/CMakeLists.txt:6 (qt_internal_add_qml_module):
  Unknown CMake command "qt_internal_add_qml_module".

I checked the bug https://bugreports.qt.io/browse/QTBUG-109003 and https://forum.qt.io/topic/136134/building-of-certain-modules-fails-with-unknown-cmake-command-qt_internal_add_qml_module but <installdir>/lib/cmake/Qt6Qml/Qt6QmlBuildInternals.cmake is correctly installed in my system.

I've tested in the following configuration of two systems, with the same results in both of them:

• Qt 6.6.0 and 6.5.3
• Ubuntu 22.04 and 20.04
• Installed from online installer and built from qteverywhere
• CMake 3.22.1 and 3.27.7
• GCC 11.4.0 and 9.4.0
• Qt Design Studio 4.3.1 Community Edition