In prefix builds of non-qtbase repositories, calls to find_package(Qt6 COMPONENT Foo) did not work in tests, because the find_package calls in Qt6Config.cmake use NO_DEFAULT_PATH, and thus CMAKE_PREFIX_PATH is ignored. Non-external-project examples had the same problem. This was fixed by ffe088941378e32ea30c142cca7e63c537a41ff1 which introduced the variable QT_EXAMPLES_CMAKE_PREFIX_PATH as additional parameter in all relevant find_package calls. We now set this variable in qt_build_tests where it should be local to the tests directory and its children. We cannot use QT_ADDITIONAL_PACKAGES_PREFIX_PATH, because it's value is read once and cached in Qt6Config.cmake - we would have to clear the internal cache variable. It would probably be good to rename QT_EXAMPLES_CMAKE_PREFIX_PATH to reflect that it's not just used for examples. However, my naming skills are drained for today. Task-number: QTBUG-88264 Change-Id: I8bcfe9b7f2ee1f1b75dc725977924d09cb36822c Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io> Reviewed-by: Alexey Edelev <alexey.edelev@qt.io>