Running "make install", I see the following files installed: -- Installing: /local/kde4/share/qt5/mkspecs/modules/qt_phonon.pri -- Installing: /local/kde4/lib/qt5/plugins/designer/libphononwidgets.so I have Qt 5 installed, but not in path, so cmake should not be able to find it. Compiled from 23795b6e3feb6aeea50335566174193378beb589