Also install backported libpurple0: Pidgin depends on it.

9f34c770 · Tails developers · ebfa3b79 · 9f34c770
Commit 9f34c770 authored Jan 08, 2014 by Tails developers
--- a/config/chroot_apt/preferences
+++ b/config/chroot_apt/preferences
@@ -107,6 +107,10 @@ Package: libklibc
 Pin: release o=Debian,n=wheezy
 Pin-Priority: 999

+Package: libpurple0
+Pin: release o=Debian Backports,n=wheezy-backports
+Pin-Priority: 999
+
 Package: linux-base
 Pin: release o=Debian,a=testing
 Pin-Priority: 999