pkg/56680: lang/guile22 build step blocked with multi-job pbulk

[triaxx%netbsd.org@localhost]

>Number:         56680
>Category:       pkg
>Synopsis:       lang/guile22 build step blocked with multi-job pbulk
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 01 10:50:00 +0000 2022
>Originator:     Frédéric Fauberteau
>Release:        NetBSD 9.2
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD ultralisk.triaxx.org 9.2 NetBSD 9.2 (GENERIC) #0: Wed May 12 13:15:55 UTC 2021  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
When building the HEAD branch of pkgsrc with pbulk in a sandbox, the build step of lang/guile22 blocks with the following state:
STAT WCHAN   COMMAND
Il+  parked  /tmp/work/guile-2.2.7/libguile/.libs/guile-e(@@ (guild) main)-s/tmp/work/guile-2.2.7/meta/guildcompile--target=x86_64-unknown-netbsd9.2-Wunbound-variable-Wmacro-use-before-definition-Warity-mismatch-Wformat-L/tmp/work/guile-2.2.7/module-L/tmp/work/guile-2.2.7/module-L/tmp/work/guile-2.2.7/guile-readline-oice-9/textual-ports.goice-9/textual-ports.scm

The characteristics of the building platform are:
CPU: Intel(R) Core(TM) i7 940 @ 2.93GHz (4 cores / 8 threads)
Memory: 12 GB
Swap: 12 GB
MAKE_JOBS=9
>How-To-Repeat:
>Fix:
MAKE_JOBS_SAFE=no?