如何强制debian挤压使用libqt4-dev从debian wheezy而不升级所有包到debian wheezy？

I have a continuous integration server building some software that depends on a more recent version of libqt4-dev than the apt packages in debian squeeze provide. That version is available in debian wheezy. How can I tell apt to use libqt4-dev selectively from wheezy without upgrading all of the packages in my squeeze system to wheezy?I have a continuous integration server building