I suspect this is a bug in pacman, but would really like someone else to confirm that I'm not just confused ;-) I just removed all my haskell-related packages and re-installed the bare minimum I need: % sudo pacman -Rncs ghc % sudo pacman -S xmonad-contrib After this I find that I have two versions on utf8-string: % ghc-pkg list|grep utf8 utf8-string-0.3.4 utf8-string-0.3.6 That seems a bit strange to me so I had a look at the packages. First I confirmed that ghc provides utf8-string, which it does, version 0.3.4. Then I took a look at haskell-utf8-string (the package, version 0.3.6): % pacman -Qi haskell-utf8-string|grep Required Required By : haskell-x11-xft xmonad-contrib However, having a look at both haskell-x11-xft and xmonad-contrib it looks like they don't have a dependency that requires 0.3.6 to be installed: % pacman -Qi haskell-x11-xft|grep Depends Depends On : ghc=6.12.1 haskell-x11=1.5.0.0 haskell-utf8-string>=0.3 % pacman -Qi xmonad-contrib|grep Depends Depends On : xmonad=0.9.1 sh haskell-x11-xft=0.3 haskell-utf8-string So, why does pacman insist on installing haskell-utf8-string, when it doesn't really have to? Does pacman not use Provides properly in its dependency resolution? /M -- Magnus Therning (OpenPGP: 0xAB4DFBA4) magnus＠therning．org Jabber: magnus＠therning．org http://therning.org/magnus identi.ca|twitter: magthe