With source of Apr 6 14:24 GMT, I have:
- built and installed a new i386 kernel
- build.sh -E
- and then build.sh release fails (even without UPDATE set, so cleandir does
  happen) with

#      link  GENERIC/netbsd
/usr/src/obj.i386/tooldir.NetBSD-2.0C-i386/bin/i386--netbsdelf-ld -T /usr/src/sys/arch/i386/conf/kern.ldscript -Ttext c0100000 -e start -X -o netbsd ${SYSTEM_OBJ} ${EXTRA_OBJ} vers.o
/usr/src/obj.i386/tooldir.NetBSD-2.0C-i386/bin/i386--netbsdelf-ld: cannot open athhal-elf.o: No such file or directory

UPDATING mentions needing the latest bsd.files.mk, and after the build.sh -E
above, I certainly do have 1.35 installed (in / and /destdir/i386).

What am I missing?

Cheers,

Patrick