On Fri, 2009-04-03 at 12:47 +0200, Johannes Waldmann wrote:

Is there a nice way of upgrading ghc: I mean does cabal-upgrade know to install exactly the packages that I had with the previous ghc version?

There will be soon! http://hackage.haskell.org/trac/hackage/ticket/199 There's a patch waiting for me (or anyone else) to review and integrate into cabal-install. Duncan