qtdeclarative5-private-dev/stable (project ERROR: Unknown module(s) in QT_PRIVATE: quick-private )
qtbase5-private-dev/stable (fatal error: private/qguiapplication_p.h: 그런 파일이나 디렉터리가 없습니다)
$ sudo apt show qt5-default libqt5webchannel5-dev/stable qtbase5-private-dev/stable qtdeclarative5-private-dev/stable