This is a reminder to those who are flummoxed by all of those messages when you do 'pacman -Syu': error: failed to prepare transaction (could not satisfy dependencies) :: haskell-cairo: requires haskell-array=0.3.0.1 :: haskell-cairo: requires haskell-bytestring=0.9.1.7 :: haskell-cairo: requires haskell-haskell98=1.0.1.1 :: haskell-citeproc-hs: requires haskell-http=4000.0.9 :: haskell-citeproc-hs: requires haskell-bytestring=0.9.1.7 :: haskell-citeproc-hs: requires haskell-containers=0.3.0.0 -- and many more of a similar nature. Now that GHC 7 has moved from [staging] to [extra], we need to remove and re-install everything haskellish, and this is the procedure (taken from peti's comment on the AUR haskell-pong package, posted to the arch-haskell list on 2011 Jan 16): 1. Remove ghc and everything that depends on it: pacman -R --cascade ghc rm -rf /usr/lib/ghc-* (Wow, it's been a while since I've done that 'rm' bit -- this time it's cleaning out directories from as far back as ghc 6.10.3!) 2. Re-install ghc and everything else you need from scratch At the moment, re-installing _everything_ will _not_ work (more about that in another message), but installing Haskell Platform -- pacman -S haskell-platform does work, with no problem at all. And since I had never actually installed the Haskell Platform before, per se, it was a pleasure to see it working! -- ___ ___ __ _ / _ \ / _ \| | | | Gregory D. Weber, Associate Professor / /_\// / | | | /\ | | Indiana University East / /_\\/ /__| | |/ \| | http://mypage.iu.edu/~gdweber/ \____/\_____/\___/\__/ Tel. (765) 973-8420; FAX (765) 973-8550