(More feedback on HOpenGL-1.01 with GHC-5.02 + Cygwin + Windows98):

One day I decided to issue the "make clean" command to free some space in HOpenGL. I was surprised when I discovered that, after doing this, my programs now complain: "could not find interface file for GLUT/GL". After I re-compiled HOpenGL once again, everything came back to normality. Is this a "make clean bug"?

I noticed some "new" warning messages when compiling HOpenGL (I got the latest pack from Sven's site):