The CMakeCache.txt file has CMAKE_HOME_DIRECTORY pointing to the project source directory used to configure the project. When importing a cmake build the CMAKE_HOME_DIRECTORY from CMakeCache.txt might not point to the same CMakeLists.txt that was opened as a project. qt-cmake-standalone-test from Qt6 uses a CMake template project which does a add_subdirectory with the test source directory, which will not work if opened standalone. Normally this is a user error though, so ask the user if this was intended, before actually importing the build. Task-number: QTBUG-88776 Change-Id: Ifdd5e1d1cb8a1ef9955d22493eba3a1a55dc689f Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io> Reviewed-by: Cristian Adam <cristian.adam@qt.io>