graphics/libGL: error while upgrading

[barbara]

Running portupgrade with -p option:
...
Creating bzip'd tar ball in '/usr/ports/packages/All/libGL-7.3.tbz'
tar: include/GL/amesa.h: Cannot stat: No such file or directory
tar: include/GL/fxmesa.h: Cannot stat: No such file or directory
tar: include/GL/uglglutshapes.h: Cannot stat: No such file or directory
tar: include/GL/uglmesa.h: Cannot stat: No such file or directory
tar: include/GL/xmesa.h: Cannot stat: No such file or directory
tar: include/GL/xmesa_x.h: Cannot stat: No such file or directory
tar: include/GL/xmesa_xf86.h: Cannot stat: No such file or directory
tar: Error exit delayed from previous errors.
pkg_create: make_dist: tar command failed with code 256
...

indeed the files are  missing.

I would like to add that after upgrading all the ports, I can't run X using nvidia-driver anymore.

Thanks