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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:

 unity-control-center : Depends: libcheese-gtk23 (>= 3.4.0) but it is not going to be installed

                        Depends: libcheese7 (>= 3.0.1) but it is not going to be installed

E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.