xmonad on F10

[lostson]

Hello all 
 I am trying to build xmonad on F10 but keep getting this error 

Configuring xmonad-0.8...
Setup.lhs: At least the following dependencies are missing:
    X11 >=1.4.1

 I do have X11 and the development stuff installed though
 
  rpm -q libX11
libX11-1.1.4-5.fc10.x86_64
libX11-1.1.4-5.fc10.i386

This is a 64 bit machine but why cant the configure script find the
appropriate libs it needs ?

-- 
LostSon

http://lostsonsvault.org