The 3.30.1 update to syslog-ng breaks the build with a non-default Python version. Line 184 of the Makefile should not have Python 3.7 hardcoded in the file name.
Created attachment 220952 [details]
Needs a port revision bump as well. I can take care of it.
A commit references this bug:
Date: Wed Dec 30 05:51:10 UTC 2020
New revision: 559641
Fix build with broken nondefault python.
Submitted by: Christian Ullrich <chris _ chrullrich.net>