How to best remove sphinx18 dependency from ports tree?

[Chris]

Context:
Fresh install, fresh co of src/ && ports/
FreeBSD 13.0-CURRENT FreeBSD 13.0-CURRENT #0 r361107 amd64
Working Copy Root Path: /usr/ports
Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5
Revision: 535355
Last Changed Author: jbeich
Last Changed Rev: 535355
Last Changed Date: 2020-05-15 23:31:07 -0700 (Fri, 15 May 2020)

cd /usr/ports/x112/nvidia-driver-340 && make

ultimately returns:
...
Move: bin/sphinx-quickstart --> bin/sphinx-quickstart-3.7
Link: @bin/sphinx-quickstart --> bin/sphinx-quickstart-3.7
====> Compressing man pages (compress-man)
===>  Installing for py37-sphinx18-1.8.5_1,1
===>  Checking if py37-sphinx18 is already installed
===>   Registering installation for py37-sphinx18-1.8.5_1,1 as automatic
Installing py37-sphinx18-1.8.5_1,1...
pkg-static: py37-sphinx18-1.8.5_1,1 conflicts with py37-sphinx-3.0.2,1 (installs
 files into the same place).  Problematic file: /usr/local/bin/sphinx-apidoc-3.7
*** Error code 70

Stop.
make[8]: stopped in /usr/ports/textproc/py-sphinx18
*** Error code 1

Stop.
make[7]: stopped in /usr/ports/devel/llvm80
*** Error code 1
...


Thanks in advance for any, and all insight into resolving this error.

As a side question related to llvm80; why is an AMD GPU even involved?

--Chris