I checkout latest code from main branch adn build failed

command: ./build.sh -a mipsel -m evbmips -O /usr/world/mipsel_obj
-T /usr/world/mipsel_tools -U -u kernel=/opt/netbsd/conf/m1550nfs
===> build.sh started: Sun Sep 10 19:06:02 CST 2006
===> MACHINE:          evbmips
===> MACHINE_ARCH:     mipsel
===> TOOLDIR path:     /usr/world/mipsel_tools
===> DESTDIR path:     /usr/world/mipsel_obj/destdir.evbmips
===> RELEASEDIR path:  /usr/world/mipsel_obj/releasedir
===> makewrapper:      /usr/world/mipsel_tools/bin/nbmake-evbmips
===> Updated /usr/world/mipsel_tools/bin/nbmake-evbmips
===> Building kernel without building new tools
===> Building kernel:  /opt/netbsd/conf/m1550nfs
===> Build directory:
/usr/world/mipsel_obj/sys/arch/evbmips/compile/m1550nfs
/usr/src/_/sys/conf/files:1216: cannot open
/usr/src/_/sys/secmodel/files.secmod
el for reading: No such file or directory

*** Stop.

ERROR: nbconfig failed for /opt/netbsd/conf/m1550nfs
*** BUILD ABORTED ***