NetBSD build failure around __RCSID

[Sad Clouds <cryintothebluesky%gmail.com@localhost>]

Hello, I've just done:
cvs -d$CVS_ROOT_DIR -q update -dPAC -r netbsd-10 netbsd-10-src

and see the following error, is this a known issue? I'm building on
Debian 12.

dependall ===> compat
#   compile  compat/strtonum.lo
cc -O   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I. -I./include -I/netbsd_build/netbsd-10-src/tools/compat -I/netbsd_build/netbsd-10-src/tools/compat/sys  -DHAVE_NBTOOL_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I. -I./include -I/netbsd_build/netbsd-10-src/tools/compat -I/netbsd_build/netbsd-10-src/tools/compat/sys -DHAVE_NBTOOL_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D__DBINTERFACE_PRIVATE -c -o strtonum.lo.o    /netbsd_build/netbsd-10-src/tools/compat/../../lib/libc/stdlib/strtonum.c
/netbsd_build/netbsd-10-src/tools/compat/../../lib/libc/stdlib/strtonum.c:32:9: error: expected declaration specifiers or '...' before string constant
   32 | __RCSID("$NetBSD: strtonum.c,v 1.6.10.1 2024/08/23 16:15:13 martin Exp $");
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

*** Failed target: strtonum.lo
*** Failed commands:
        ${_MKTARGET_COMPILE}
        => @echo '#  ' "compile " compat/strtonum.lo
        ${HOST_COMPILE.c} -o ${.TARGET}.o ${COPTS.${.IMPSRC:T}} ${CPUFLAGS.${.IMPSRC:T}} ${CPPFLAGS.${.IMPSRC:T}} ${.IMPSRC}
        => cc -O   -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I. -I./include -I/netbsd_build/netbsd-10-src/tools/compat -I/netbsd_build/netbsd-10-src/tools/compat/sys  -DHAVE_NBTOOL_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -I. -I./include -I/netbsd_build/netbsd-10-src/tools/compat -I/netbsd_build/netbsd-10-src/tools/compat/sys -DHAVE_NBTOOL_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 -D__DBINTERFACE_PRIVATE -c -o strtonum.lo.o    /netbsd_build/netbsd-10-src/tools/compat/../../lib/libc/stdlib/strtonum.c
        ${MV} ${.TARGET}.o ${.TARGET}
        => mv -f strtonum.lo.o strtonum.lo
*** [strtonum.lo] Error code 1

nbmake[3]: stopped in /netbsd_build/netbsd-10-src/tools/compat
1 error