root@martijn-i7:~# sudo apt-get install aptitude
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:
 aptitude : Depends: libcwidget3v5 but it is not going to be installed
            Depends: libsigc++-2.0-0v5 (>= 2.6.1) but it is not going to be installed
 libstdc++6 : Depends: gcc-5-base (= 5.3.1-14ubuntu2.1) but 5.4.0-3ubuntu1~12.04 is to be installed
              Breaks: libstdc++6:i386 (!= 5.3.1-14ubuntu2.1) but 6.1.1-3ubuntu11~12.04.1 is to be installed
 libstdc++6:i386 : Breaks: libstdc++6 (!= 6.1.1-3ubuntu11~12.04.1) but 5.3.1-14ubuntu2.1 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).