4.1 was configured just to use the update channel, so I setup this for 4.2 using http://updates.software-univention.de/4.2/maintained/4.2-0/ucs420/ as well. However, a basic build test shows unresolvable: nothing provides autoconf, nothing provides automake, nothing provides autotools-dev needed by libtool so, it seems it is not enough to have just the update repo?