Our dashboard scripts use the variables QT5_INSTALL_PREFIX and QT_BINARY_DIR to determine the location of qmake to ultimately query the version of Qt to add the correct path to CEST_PATH. It's a pain in the back to maintain these variable values over time, though. In particular with distributed build clients that may have different minor Qt versions or paths in gerenal. On the other side, it's not easy to figure out the Qt path actually found/set in MITK on the dashboard script level. So in future, one would either have to add the Qt path right in the dashboard script like set(ENV{PATH} "$ENV{PATH}...") or add Qt to the PATH on the system itself.