empathy-nonprism was removed from nonprism repo - manual intervention required

Since libpurple-nonprism is stable (a modified version without services protocols like Facebook, QQ, Google Talk, MSN, Gadu Gadu, ICQ, Myspace, etc), some packages like telepathy-haze which is a dependency of libpurple were removed from your-privacy's blacklist. Otherwise, empathy-nonprism is a modified version without telepathy-haze recommendation, this means empathy-nonprism isn't needed anymore since version 3.10.1-1 and it will be removed from repos.

You should install the empathy package manually using regular pacman methods. Accept the empathy-nonprism removal and that's it.