It is easy enough to recreate the link manually or as easy to run cabal install again, but that is not the point here. The point is that it will bite the next dozen of unsuspecting users since, at first, they have no idea of what is going on. In any case, apologies for sending this in this thread as it doesn't seem the right forum to discuss it. On Thu, Sep 5, 2013 at 7:53 AM, Paolo Giarrusso wrote:

On Wednesday, September 4, 2013 11:41:33 PM UTC+2, Yuri de Wit wrote:

...

Thanks for all the hard work!

If you see this in OSX (#1009) while installing cabal 1.18:

*Warning: could not create a symlink in /Users/lemao/Library/Haskell/bin for* *cabal because the file exists there already but is not managed by cabal. You* *can create a symlink for this executable manually if you wish. The executable* *file has been installed at* */Users/user/Library/Haskell/ghc-7.6.3/lib/cabal-install-1.18.0/bin/cabal *

You will need to manually remove the pre-existing 1.16 links in ~/Library/Haskell/bin before installing again.

Instead of installing again, you can even just recreate the symlink as mentioned by the message (if you know how to do that).