title: How to force debian squeeze to use libqt4-dev from debian wheezy without upgrading all packages to debian wheezy?
body: <p>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?</p>