OpenGL failing with Mac Intel 6.6 distribution

[Deborah Goldsmith]

I'm attempting to build frag on Mac OS X Intel with the 6.6  
distribution, and I hit the following:

/tmp/ghc25850_0/ghc25850_0.hc:5:22:
      error: HsOpenGL.h: No such file or directory

A comparison of the C include directories for 6.6 and a recent 6.5  
build gives:

$ diff -r /usr/local/lib/ghc-6.5.20061008/include/ /usr/local/lib/ 
ghc-6.6/include/
Only in /usr/local/lib/ghc-6.5.20061008/include/: HsOpenGL.h
Only in /usr/local/lib/ghc-6.5.20061008/include/: HsOpenGLExt.h
Only in /usr/local/lib/ghc-6.5.20061008/include/: HsOpenGLTypes.h
Only in /usr/local/lib/ghc-6.6/include/: HsReadline.h
Only in /usr/local/lib/ghc-6.6/include/: HsReadlineConfig.h
diff -r /usr/local/lib/ghc-6.5.20061008/include/ghcautoconf.h /usr/ 
local/lib/ghc-6.6/include/ghcautoconf.h
130c130
< #define HAVE_LIBIBERTY 1
---
 > /* #undef HAVE_LIBIBERTY */

Is the fact that HSOpenGL*.h is missing in 6.6 expected?

Thanks,
Deborah