KActivities fails with the error below. Is boost::optional installed? 04:17:31 /Users/jenkins/builds/kactivities/kf5-qt5/src/utils/continue_with.h:14:10: fatal error: 'boost/optional.hpp' file not found 04:17:31 #include <boost/optional.hpp> -- David Faure, faure at kde.org, http://www.davidfaure.fr Working on KDE Frameworks 5