'apt-get -o Debug::pkgProblemResolver=true dist-upgrade' says:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Starting
Starting 2
Investigating evolution-data-server
Package evolution-data-server has broken dep on evolution
Considering evolution 5 as a solution to evolution-data-server 6
Will not break evolution as stated in Breaks field in evolution-data-server
Package evolution-data-server has broken dep on evolution-exchange
Considering evolution-exchange 1 as a solution to evolution-data-server 6
Will not break evolution-exchange as stated in Breaks field in
evolution-data-server
Done
Failed
The following packages have unmet dependencies.
evolution-data-server: Breaks: evolution (< 2.9) but 2.8.1-0ubuntu4 is to be
installed
Breaks: evolution-exchange (<= 2.8.1-0ubuntu1) but
2.8.1-0ubuntu1 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by
held packages.
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[Feisty]evolution-data-server wont install
https://launchpad.net/bugs/74797
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