Take a look at this [1], particularly the second answer, which links to a Github Gist for "ghc-pkg-clean." I tend to use that when I run into trouble. [1] http

Take a look at this [1], particularly the second answer, which links to a Github Gist for "ghc-pkg-clean." I tend to use that when I run into trouble. [1] http://stackoverflow.com/questions/7961604/fixing-issues-noted-by-ghc-pkg-check http://stackoverflow.com/questions/7961604/fixing-issues-not...