hal9000@hal9000-Dell-Precision-M3800:~$ sudo apt -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  bbswitch-dkms compiz-plugins dkms freeglut3 freeglut3-dev libcublas5.5
  libcuda1-352 libcudart5.5 libcufft5.5 libcufftw5.5 libcuinj64-5.5
  libcurand5.5 libcusparse5.5 libdrm-dev libept1.4.12 libgl1-mesa-dev
  libglu1-mesa-dev libjansson4 libnppc5.5 libnppi5.5 libnpps5.5 libnvtoolsext1
  libnvvm2 libtcmalloc-minimal4 libthrust-dev libvdpau-dev libx11-xcb-dev
  libxcb-dri2-0-dev libxcb-dri3-dev libxcb-glx0-dev libxcb-present-dev
  libxcb-randr0-dev libxcb-shape0-dev libxcb-sync-dev libxcb-xfixes0-dev
  libxmu-dev libxmu-headers libxnvctrl0 libxshmfence-dev libxt-dev
  libxxf86vm-dev linux-headers-3.19.0-25 linux-headers-3.19.0-25-generic
  linux-image-3.19.0-25-generic linux-image-extra-3.19.0-25-generic
  mesa-common-dev nvidia-prime opencl-headers python-compizconfig
  screen-resolution-extra x11proto-dri2-dev x11proto-gl-dev
  x11proto-xf86vidmode-dev
Use 'apt-get autoremove' to remove them.
0 to upgrade, 0 to newly install, 0 to remove and 2 not to upgrade.
hal9000@hal9000-Dell-Precision-M3800:~$ sudo apt-get install account-plugin-irc
Reading package lists... Done
Building dependency tree       
Reading state information... Done
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.
 account-plugin-irc : Depends: empathy (= 3.8.6-0ubuntu9) but 3.8.6-0ubuntu9.2 is to be installed
E: Unable to correct problems, you have held broken packages.
hal9000@hal9000-Dell-Precision-M3800:~$