Trying to upgrade a Debian Wheezy KDE desktop installation to Devuan Jessie, I encounter the following problem: The upgrade stops with a dependency issue.

root@klepti:~# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Failed
The following packages have unmet dependencies:
 modemmanager : Breaks: network-manager (< 0.9.8.2-1) but 0.9.4.0-10 is to be installed
 plasma-nm : Depends: network-manager (>= 0.9.8.4) but 0.9.4.0-10 is to be installed
 ppp : Breaks: network-manager (< 0.9.8.8-7~) but 0.9.4.0-10 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

The package "network-manager" in Devuan Jessie is at version 0.9.10.0-7 which is too new for "ppp" and "modemmanager". The package "plasma-nm" in contrary needs a newer version of network-manager than the latter two.

In addition, on a freshly installed Devuan system trying to install network-manager, it yields:

root@schneewittchen:~# apt-get install network-manager
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 network-manager : Depends: libpam-systemd but it is not going to be installed
E: Unable to correct problems, you have held broken packages. 

I see this is probably a problem that will be worked on anyway, because it goes back to a systemd dependency.

But anyway thanks for resolving this dependency problem.