重新打源码包gstreamer-plugins-base.src.rpm错误.

在重新打源码包时出现：
/bin/sh: moc: command not found
make[4]: *** [moc_qtgv-xoverlay.cpp] Error 127
make[4]: Leaving directory `/root/rpmbuild/BUILD/gst-plugins-base-0.10.29/tests/examples/overlay'
make[3]: *** [overlay] Error 2
make[3]: Leaving directory `/root/rpmbuild/BUILD/gst-plugins-base-0.10.29/tests/examples'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/root/rpmbuild/BUILD/gst-plugins-base-0.10.29/tests'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/root/rpmbuild/BUILD/gst-plugins-base-0.10.29'
make: *** [all] Error 2
error: Bad exit status from /var/tmp/rpm-tmp.UlYMvt (%build)

RPM build errors:
Bad exit status from /var/tmp/rpm-tmp.UlYMvt (%build)

请问这如何解决？