hi, friends
I am using archlinux and both xmonad and xmonad-contrib are installed by pacman.
%pacman -Q|grep xmonad
xmonad 0.9.1-4
xmonad-contrib 0.9.1-2

%%xmonad --recompile
Error detected while loading xmonad configuration file: /home/sw2wolf/.xmonad/xmonad.hs

xmonad.hs:20:7:
    Could not find module `XMonad.Layout.LayoutHints':
      Use -v to see a list of the files searched for.

%ghc-pkg list|grep xmonad
    xmonad-0.9.1
    xmonad-contrib-0.9.1

%pacman -Ql xmonad-contrib|grep LayoutHints
xmonad-contrib /usr/lib/ghc-6.12.1/site-local/xmonad-contrib-0.9.1/XMonad/Layout/LayoutHints.hi

   %ghc-pkg field xmonad-contrib exposed-modules | grep LayoutHints
                 XMonad.Layout.LayoutCombinators XMonad.Layout.LayoutHints


Sincerely!