[HOpenGL] Makefile for the examples

Hi there. I think I installed HOpenGL successfully. But if I try to compile an example by myself the ghc breaks up. I tried that with ghc -i/usr/lib/ghc-5.02.3/imports/HOpenGL/ -i/usr/lib/ghc-5.02.3/imports/lang/ Hello.hs and got error-messages like Module `GL' is located in package `Main' but its interface file claims it is part of package `HOpenGL' and much of linker-errors. Is there somebody who can give me a short makefile to see what was wrong. I am new in Haskell and use OpenGl in C only. thanx Patrick