sudo apt-get install xchat
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:
 linux-generic-lts-wily : Depends: linux-headers-generic-lts-wily (= 4.2.0.34.27) but 4.2.0.30.24 is to be installed
 xchat : Depends: libsexy2 (>= 0.1.8) but it is not going to be installed
         Depends: xchat-common (= 2.8.8-7.1ubuntu5.1) but it is not going to be installed
         Recommends: xchat-indicator but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).