test_dependent_modules fails with Ubuntu 20.04

agent:2020/11/09 10:22:57 build.go:379: 201: Test timeout computed to be: 1500
agent:2020/11/09 10:22:57 build.go:379: 201: Internal cmake changing into directory: /home/qt/work/qt/qtbase_standalone_tests/tests/auto/cmake/test_dependent_modules
agent:2020/11/09 10:22:57 build.go:379: 201: Error: cmake execution failed
agent:2020/11/09 10:22:57 build.go:379: 201: CMake Error at CMakeLists.txt:7 (find_package):
agent:2020/11/09 10:22:57 build.go:379: 201: By not providing "FindQt6Widgets.cmake" in CMAKE_MODULE_PATH this project
agent:2020/11/09 10:22:57 build.go:379: 201: has asked CMake to find a package configuration file provided by
agent:2020/11/09 10:22:57 build.go:379: 201: "Qt6Widgets", but CMake did not find one.
agent:2020/11/09 10:22:57 build.go:379: 201: 
agent:2020/11/09 10:22:57 build.go:379: 201: Could not find a package configuration file provided by "Qt6Widgets" with
agent:2020/11/09 10:22:57 build.go:379: 201: any of the following names:
agent:2020/11/09 10:22:57 build.go:379: 201: 
agent:2020/11/09 10:22:57 build.go:379: 201: Qt6WidgetsConfig.cmake
agent:2020/11/09 10:22:57 build.go:379: 201: qt6widgets-config.cmake
agent:2020/11/09 10:22:57 build.go:379: 201: 
agent:2020/11/09 10:22:57 build.go:379: 201: Add the installation prefix of "Qt6Widgets" to CMAKE_PREFIX_PATH or set
agent:2020/11/09 10:22:57 build.go:379: 201: "Qt6Widgets_DIR" to a directory containing one of the above files. If
agent:2020/11/09 10:22:57 build.go:379: 201: "Qt6Widgets" provides a separate development package or SDK, be sure it has
agent:2020/11/09 10:22:57 build.go:379: 201: been installed