Bmake bad variable name

From: bob prohaska <fbsd_at_www.zefox.net>
Date: Tue, 29 Aug 2023 02:23:30 UTC
A Pi4 running 

FreeBSD nemesis.zefox.com 15.0-CURRENT FreeBSD 15.0-CURRENT aarch64 1500000 #79 main-n265053-315ee00fa961: Mon Aug 28 12:30:35 PDT 2023     bob@nemesis.zefox.com:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC arm64

seems to have trouble
with bmake in poudriere:

root@nemesis:/usr/local/poudriere # bmake: "/usr/ports/Mk/bsd.port.mk" line 1213: UNAME_r (15.0-CURRENT) and OSVERSION (1400096) do not agree on major version number.
bmake: "/usr/share/mk/sys.mk" line 187: Unknown modifier ":Q"
bmake: "/usr/share/mk/sys.mk" line 201: Unknown modifier ":Q"
bmake: Fatal errors encountered -- cannot continue
eval: bmake:: not found
export: bmake:: bad variable name
make: "/usr/ports/Mk/bsd.port.mk" line 1213: UNAME_r (15.0-CURRENT) and OSVERSION (1400096) do not agree on major version number.
[00:01:33] Error: Error looking up pre-build ports vars

The first line seems related to the version number jump from 14 to 15, but the 
two following appear unrelated.

Poudriere was executing 
poudriere bulk -j main www/chromium > chromium.log
which has been working (apart from source problems)
without difficulty.

A quick re-run of git pull in /usr/ports reported up to date,
is there something else to try? Poudriere reports status of
stopped; crashed on the web page.

Thanks for reading,

bob prohaska