zsofi@zS:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 steam-launcher : Depends: libc6 (>= 2.15) but 2.13-38+deb7u1 is installed
                  Recommends: jockey-common but it is not installable
E: Unmet dependencies. Try using -f.