installing opengl:1.20 ...
changing current directory to /tmp/tempc647.6235/opengl
  '/usr/local/bin/csi' -bnq -setup-mode -e "(require-library setup-api)" -e "(import setup-api)" -e "(setup-error-handling)" -e "(extension-name-and-version '(\"opengl\" \"1.20\"))" 'opengl.setup'
make: making gl.so
  '/usr/local/bin/csc' -feature compiling-extension -setup-mode    -s -O3 -d0 gl.scm  -L/usr/X11R6/lib -L/usr/X11/lib -lGL -lGLU -LX11 -J
gl.c:17:21: fatal error: GL/gl.h: No such file or directory
compilation terminated.

Error: shell command terminated with non-zero exit status 256: 'gcc' 'gl.c' -o 'gl.o' -c  -fno-strict-aliasing -fwrapv -DHAVE_CHICKEN_CONFIG_H -DC_ENABLE_PTABLES -Os -fomit-frame-pointer -fPIC -DPIC -DC_SHARED -I"/usr/local/include/chicken"
make: Failed to make gl.so: shell command failed with nonzero exit status 256:

  '/usr/local/bin/csc' -feature compiling-extension -setup-mode    -s -O3 -d0 gl.scm  -L/usr/X11R6/lib -L/usr/X11/lib -lGL -lGLU -LX11 -J

Error: shell command failed with nonzero exit status 256:

  '/usr/local/bin/csc' -feature compiling-extension -setup-mode    -s -O3 -d0 gl.scm  -L/usr/X11R6/lib -L/usr/X11/lib -lGL -lGLU -LX11 -J


Error: shell command terminated with nonzero exit code
17920
"'/usr/local/bin/csi' -bnq -setup-mode -e \"(require-library setup-api)\" -e \"(...