If you search for "cabal install", the first link is http://hackage.haskell.org/trac/hackage/wiki/CabalInstall, which in turn leads to http://haskell.org/cabal/download.html. It looks very official and canonical and all that, but that page has an old version of cabal install that will no longer compile with ghc7 because it requires old libraries. Of course it won't tell you that right off, first it will install a whole bunch of old stuff, charge you a fiver, and then emit some "constraint can't be satisfied" msgs which if you have some experience with haskell and cabal already should eventually tip you off that something's wrong. Is there someone out there who has permissions to either take that page down, or replace it with a link to the new version at http://hackage.haskell.org/package/cabal-install? I updated http://hackage.haskell.org/trac/hackage/wiki/CabalInstall to point to the platform and to the hackage page, but the cabal page at http://haskell.org/haskellwiki/Cabal-Install still links to http://haskell.org/cabal/download.html. Should I just replace the haskellwiki page with a link to the hackagewiki one? I would try to port over any up to date info of course.