RayVR/numpy — comment on commit 4a2f21c453c705606f16a30a5798fd80bdb3460d
File:  line 0
By rgommers:

Isn't it possible that /usr/X11R6 exists and /usr/X11 doesn't? Why not remove the if statement and append the elif part to the lists if /usr/lib/X11 exists?