maintainer-feedback requested: [Bug 277529] lang/go121: doesn't respect MAKE_JOBS_NUMBER while building

Bugzilla Automation <bugzilla@FreeBSD.org> has asked Golang Team (Nobody)
<go@FreeBSD.org> for maintainer-feedback:
Bug 277529: lang/go121: doesn't respect MAKE_JOBS_NUMBER while building
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277529



--- Description ---
I constantly see lots of compiler processes while building, despite that
poudriere sets MAKE_JOBS_NUMBER=1 by default and I didn't change that:

$ ps aux | grep '[c]ompile'
pbuild	     32550   0.0  0.0 1244420  25748  -  RJ   16:41	  0:00.04
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b504/_p
pbuild	     32551   0.0  0.0 1244532  29712  -  RJ   16:41	  0:00.06
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b503/_p
pbuild	     32552   0.0  0.0 1244744  25624  -  RJ   16:41	  0:00.07
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b501/_p
pbuild	     32553   0.0  0.0 1244420  23172  -  RJ   16:41	  0:00.03
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b408/_p
pbuild	     32554   0.0  0.0 1243484  20368  -  RJ   16:41	  0:00.02
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b512/_p
pbuild	     32555   0.0  0.0 1241536  17232  -  RJ   16:41	  0:00.01
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b510/_p
pbuild	     32556   0.0  0.0 1244572  24908  -  RJ   16:41	  0:00.03
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b506/_p
pbuild	     32557   0.0  0.0 1242656  22748  -  RJ   16:41	  0:00.02
/wrkdirs/usr/ports/lang/go121/work/go/pkg/tool/freebsd_amd64/compile -o
/tmp/go-build4287296582/b499/_p