A lot of things you've probably already installed depend on libeina0, so doing apt-get -f is not a good idea, it can potentially break a lot of programs. Don't do it unless you understand the implications.

Easier to wait until the devs of enna figure out their junk and get it sorted, or like others have said, remove everything that depends on this library - apt-get autoremove libeina0 - and then reinstall enna. (apt-get install enna) It should work fine after that.