Can't build Qt5.1beta under ubuntu

[billconan]

getting:

cd widgets/ && ( test -e Makefile || /home/shiy/Downloads/qt-everywhere-opensource-src-5.1.0-beta1/qtbase/bin/qmake /home/shiy/Downloads/qt-everywhere-opensource-src-5.1.0-beta1/qtdeclarative/src/imports/widgets/widgets.pro -o Makefile ) && make -f Makefile
Project ERROR: Unknown module(s) in QT: quick
make[3]: *** [sub-widgets-make_first] Error 3
make[3]: Leaving directory /home/shiy/Downloads/qt-everywhere-opensource-src-5.1.0-beta1/qtdeclarative/src/imports' make[2]: *** [sub-imports-make_first-ordered] Error 2 make[2]: Leaving directory /home/shiy/Downloads/qt-everywhere-opensource-src-5.1.0-beta1/qtdeclarative/src'
make[1]: *** [sub-src-make_first] Error 2
make[1]: Leaving directory `/home/shiy/Downloads/qt-everywhere-opensource-src-5.1.0-beta1/qtdeclarative'
make: *** [module-qtdeclarative-make_first] Error 2

should I remove quick from the pro file?