make obj failed

Hi,

I am updating OpenBSD 6.4 on sparc64 and during make obj i get the following error:

building rem.S from /usr/src/lib/libc/arch/sparc64/gen/divrem.m4
/bin/sh: cannot create rem.S: Permission denied
*** Error 1 in lib/libc (arch/sparc64/Makefile.inc:23 'rem.S': @(echo "define(NAME,\`.rem')define(OP,\`rem')define(S,\`true')"; cat /usr/sr...)
*** Error 1 in lib (<bsd.subdir.mk>:48 'all')
*** Error 1 in . (<bsd.subdir.mk>:48 'all')
*** Error 1 in . (Makefile:95 'do-build')
*** Error 1 in /usr/src (Makefile:74 'build')

What might be the issue here?

all best,
mjb