Created attachment 199686 [details]
Update ports-mgmt/porttree from 0.4.r65 to 0.5.r66. This adopts the API changes made in math/py-networkx with a major version upgrade.
Also, add "USE_PYTHON=flavors optsuffix" to silence warnings. This port itself from single package can work with any supported Python flavor, unlike dependences. I have not found any recommendation for this kind of situation, yet.
A commit references this bug:
Date: Sun Dec 2 21:24:14 UTC 2018
New revision: 486485
ports-mgmt/porttree: Update to 0.5.r66
Submitted by: email@example.com (maintainer)