hugs98 and X11

Hi, I've downloaded and successfully built hugs98. However, whenever I try and import a module such as Graphics.SOE, I get the following error: ERROR "/opt/local/lib/hugs/packages/HGL/Graphics/HGL/Internals/Types.hs" - Can't find imported module "Graphics.X11.Xlib" Has anyone else had this problem? If I use ghci then I don't get this problem. Regards, Calum.