Steam won't run

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:
 indicator-network : Depends: unity8 (>= 7.82) but it is not going to be installed
 libcheese-gtk23 : Depends: libcheese7 (>= 3.4.0) but it is not going to be installed
                   Depends: libclutter-1.0-0 (>= 1.13.2) but it is not going to be installed
                   Depends: libclutter-gtk-1.0-0 (>= 0.91.8) but it is not going to be installed
                   Depends: libcogl15 (>= 1.15.8) but it is not going to be installed
 libgl1-mesa-glx:i386 : Depends: libglapi-mesa:i386 (= 10.1.3-0ubuntu0.5)
 libqt5gui5 : Depends: libegl1-mesa (>= 7.8.1) or
                       libegl1-x11
              Depends: libgbm1 (>= 8.1~0) but it is not going to be installed
 libubuntu-application-api-mirserver1 : Depends: libmirserver18 (>= 0.1.8+14.04.20140408.1) but it is not going to be installed
 libunity-mir1 : Depends: libmirserver18 (>= 0.1.8+14.04.20140411) but it is not going to be installed
 qtdeclarative5-qtquick2-plugin : Depends: libgl1-mesa-dri
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

Every украл I try and run Стеам I get this ошибка message, what should I do?