[plt-scheme] compile error for OpenGL

I'm getting this error when I try to make install version 372. I'm
probably just missing a library, but heck if I know which one. :-)

setup-plt: Error during Compiling .zos for Gobblet
(/opt/plt/lib/plt/collects/games/gobblet)
setup-plt:   default-load-handler: cannot open input file:
"/opt/plt/lib/plt/collects/sgl/gl-info.ss" (No such file or directory;
errno=2)
setup-plt: Error during Compiling .zos for sgl (/opt/plt/lib/plt/collects/sgl)
setup-plt:   default-load-handler: cannot open input file:
"/opt/plt/lib/plt/collects/sgl/gl-info.ss" (No such file or directory;
errno=2)

Any help appreciated,
Todd