Hello everybody, I was trying to build xmonad and stumbled upon a problem. I have already installed X11-1.3.0 and X11-extras-0.4. It seems that they both expose a module 'Graphics.X11.Xlib.Extras'. As a result of this, while trying to build xmonad, I get: ---------------------------------------------------------------- santanu@sc214:~/Desktop/xmonad/xmonad-0.4$ runhaskell Setup.lhs build Preprocessing executables for xmonad-0.4... Building xmonad-0.4... XMonad.hs:38:7: Could not find module `Graphics.X11.Xlib.Extras': it was found in multiple packages: X11-extras-0.4 X11-1.3.0 santanu@sc214:~/Desktop/xmonad/xmonad-0.4$ ghc-pkg list /usr/lib/ghc-6.6/package.conf: Cabal-1.1.3, Cabal-1.1.6, X11-1.3.0, X11-extras-0.4, base-2.0, filepath-1.0, (ghc-6.6), haskell98-1.0, mtl-1.0, parsec-2.0, readline-1.0, regex-base-0.71, regex-compat-0.71, regex-posix-0.71, rts-1.0, stm-2.0, template-haskell-2.0, unix-1.0, unix-2.0 ----------------------------------------------------------------- How do I solve this problem? (I am completely new to haskell. So I apologize in advance if this is too trivial a question). By the way, I also tried to unregister X11-1.3.0 and installed X1-1.2.3 (since it does not seem to expose the module in question) and tried again. But that did not work either. Thanks in advance for your help. Regards, Santanu Chatterjee