My original problem was that I wanted to load a particular set of packages using 'cabal install'. It didn't work (cabal install issues) and while the maintainer reacted promptly and helpfully, cabal kept on trying to install the wrong version. Part of the problem was that blasting away ~/.cabal and ~/Library/Haskell wasn't enough: it's necessary to blast away ~/.ghc as well (which I had forgotten existed and of course never saw). * It would be handy if 'uninstall-hs' had an option, say * uninstall-hs --user * so that a user could in one step make it as if they had never * used the Haskell Platform. (Sigh. Changes to the GHC command line interface since 7.0 have broken one of the packages I used to have installed, and the maintainer's e-mail address doesn't work any more. And sometimes it seems as if every time I install anything with cabal something else breaks.) PS. Earlier today cabal gave me some confusing messages which turned out to mean 'GSL isn't installed'. Non-Haskell dependencies could be explained a little more clearly.