failure to compile llvm13

I am brought to a grinding halt upgrading my apps with this error:

Configuration error:
There is a programmable error in your configuration file:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/sphinx/config.py", line 329, in eval_config_file
    exec(code, namespace)
  File "/usr/ports/devel/llvm13/work/llvm-project-13.0.1.src/flang/docs/conf.py", line 14, in <module>
    from recommonmark.parser import CommonMarkParser
  File "/usr/local/lib/python3.8/site-packages/recommonmark/parser.py", line 9, in <module>
    from commonmark import Parser
ModuleNotFoundError: No module named 'commonmark'

Any ideas on where to go from here?


root@happy:~ # uname -a
FreeBSD happy 13.0-RELEASE-p8 FreeBSD 13.0-RELEASE-p8 #0: Tue Mar 15 09:36:28 UTC 2022     root@amd64-builder.daemonology.net:/usr/obj/usr/src/amd64.amd64/sys/GENERIC  amd64


-- 
I dream of a better tomorrow, where chickens can cross the road and not be questioned about their motives.?
? Ralph Waldo Emerson