请问各位老师，我从git上将 dtkwidget代码下下来，进入plugin目录在编译 libdcustomwidgets.so动态库时，遇到No module claims plugin type 'designer'这个问题，请问下这个怎么解决呢？

uos@uos-PC:~/Desktop/DTK/dtkwidget/plugin$ make -j$(nproc)
cd dtkuidemo/ && ( test -e Makefile || /usr/lib/qt5/bin/qmake -o Makefile /home/uos/Desktop/DTK/dtkwidget/plugin/dtkuidemo/dtkuidemo.pro ) && make -f Makefile
cd dtkuiplugin/ && ( test -e Makefile || /usr/lib/qt5/bin/qmake -o Makefile /home/uos/Desktop/DTK/dtkwidget/plugin/dtkuiplugin/dtkuiplugin.pro ) && make -f Makefile
Project ERROR: No module claims plugin type 'designer'
make: *** [Makefile:71：sub-dtkuiplugin-make_first] 错误 3