[Haskell-cafe] install 7.8.4 64 bits on arch linux

I want to upgrade from 7.8.3 32 bits to 7.8.4 64 bits on Arch Linux. So I removed ghc, cabal etc and followed the instruction at: http://sapiengames.com/2014/04/05/install-haskell-platform-arch-linux/ Added the lines [haskell-core] Server = http://xsounds.org/~haskell/core/$arch to pacman.conf added the pacman-key as described updated pacman and finally the fun parts should start.. $ sudo pacman -S ghc cabal-install happy alex looking for inter-conflicts... error: failed to prepare transaction (could not satisfy dependencies) :: haddock: requires ghc=7.8.3-2 :: haskell-ghc-paths: requires ghc=7.8.3-1 What is wrong and what can I do? Kees