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ike in squeeze, but not in any backports for wheezy

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linux-howto

http://crunchbang.org – Check out this thread. and this from the Debian Wiki.Basically, without any pinning APT will just pull the highest version number available from any repository you have listed in your sources. However, by setting the Pin-Priority for different repositories. The higher the Pin-Priority, the higher the preference. Anything with a Pin-Priority above 1000 will have the absolute highest priority to the point that it will downgrade your other packages. Good luck! (HowTos)