math/py-matplotlib: Allow build for Python 3.x - The GTKBACKEND, GTKAGGBACKEND, and WXAGGBACKEND options do not work with Python 3.x, so exclude them in that case. PR: 213636 Reported by: firstname.lastname@example.org Reviewed by: ??? Approved by: maintainer timeout Differential Revision: https://reviews.freebsd.org/D?????
I'm not sure if I'm using FLAVOR correctly here?