The last release of Haskell Platform has ghc version 7.0.3. There is nothing outdated in arch... You may be referring to the ghc 7.2, right? It is not in Haskell Platform yet. ── >> pacman -Ss haskell-platform extra/haskell-platform 2011.2.0.0-4 [0.00 M] [installed] The Haskell Platform