sim & debian unstable

Использую debian unstable, sources.list:
deb ftp://<зеркало>/debian unstable main non-free contrib

хочу поставить сима:

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# apt-get install sim
Reading Package Lists... Done
Building Dependency Tree... 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.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  sim: Depends: kdelibs4 (>= 4:3.1.5) but it is not installable
       Depends: libqt3c102-mt (>= 3:3.2.3) but it is not installable
E: Broken packages
# apt-get install kdelibs4
Reading Package Lists... Done
Building Dependency Tree... Done
Package kdelibs4 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  kdelibs4c2
E: Package kdelibs4 has no installation candidate
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Как быть? kdelibs4c2 стоит