apt-get dist-upgrade

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:
 libmatroska6 : Depends: libebml4 but it is not installed
 vlc-nox : Depends: libebml4 but it is not installed
E: Unmet dependencies. Try using -f.