I am experiencing a weird behaviour while building this port with the XEROX (devel/py-xerox) option ON:
1 - if devel/py-xerox is already installed while building this port, make build it again and later fail due to devel/py-xerox
already being installed;
2 - if devel/py-xerox is not installed, make build it and later make fail with "tremc-20171202 depends on executable:
py36-xerox - not found". Same happens with Poudriere builds.
For the record I am experiencing the same behaviour while trying to build a WIP port what depends on x11/xcb-proto:
https://github.com/kylecook80/polybar-port