I downloaded Mosfet's Liquid theme, went to ./configure and i got this message"Checking for X... Configure error can't fin X includes, please check your installation and add the correct paths"

I did a "whereis X" and got this, /usr/X11R6/bin/X /usr/bin/X11/X.
So i did "$path= /usr/X11R6/bin/X:/usr/bin/X11/X, but i still get the same message when i try to configure. Where do i put the path of X
Cheers
LiNuts