As @lunaryorn noted this was caused by a bug in the EPL package. See the discussion here for the details.
The new version is already on MELPA. If updating does not work for you - you might have to remove EPL and reinstall EPL manually.
Question
I get the following error when installing a set of packages for my emacs client (clojure-mode)
Warning (emacs): Unable to activate package pkg-info'.
Required package
dash-1.6.0' is unavailable
Warning (initialization): An error occurred while loading `/home/skinney/.emacs.d/init.el':
Wrong type argument: stringp, nil
How do I solve this? A google search reveals nothing :/
Solution
As @lunaryorn noted this was caused by a bug in the EPL package. See the discussion here for the details.
The new version is already on MELPA. If updating does not work for you - you might have to remove EPL and reinstall EPL manually.