nbmkdep: unable to write to file check.d

[raymond.meyer%rambler.ru@localhost]

I've got src and xsrc mounted as read-only. I get the following error with 
trying to build release with recent sources

do-compat-external-lib ===> .
dependall ===> compat/external/lib
dependall ===> compat/external/lib/../bsd/atf/lib
dependall ===> compat/external/lib/../bsd/atf/lib/libatf-c
#    create  libatf-c/check.d
CC=/opt/tools.sparc64/bin/sparc64--netbsd-gcc /opt/tools.sparc64/bin/nbmkdep -f 
check.d -- -m32      -I/opt/src/external/bsd/atf/lib/libatf-c -I. 
-DHAVE_CONFIG_H -DATF_ARCH=\"sparc64\" -DATF_CONFDIR=\"/etc/atf\" 
-DATF_LIBEXECDIR=\"/usr/libexec\" -DATF_MACHINE=\"sparc64\" 
-DATF_PKGDATADIR=\"/usr/share/atf\" -DATF_SHELL=\"/bin/sh\" 
-DATF_WORKDIR=\"/tmp\"  -nostdinc -isystem 
/opt/obj.sparc64/destdir.sparc64/usr/include  
/opt/src/external/bsd/atf/dist/atf-c/check.c
nbmkdep: unable to write to file check.d
: Read-only file system
*** [check.d] Error code 1
1 error

nbmake: stopped in /opt/src/compat/external/bsd/atf/lib/libatf-c
*** [dependall-libatf-c] Error code 2
1 error