5.1 -> 5.1.2 ERROR: Failed to make installworld to /

[Neal Hogan <nealhogan%gmail.com@localhost>]

I followed the upgrade instructions on
netbsd.org/docs/guide/en/chap-updating.html and get the following.
What do you think?

foo# ./build.sh -O ../obj -T ../tools -U install=/
===> build.sh command: ./build.sh -O ../obj -T ../tools -U install=/
===> build.sh started: Thu Jul 19 08:16:58 CDT 2012
===> NetBSD version:   5.1.2_PATCH
===> MACHINE:          i386
===> MACHINE_ARCH:     i386
===> Build platform:   NetBSD 5.1.2_PATCH i386
===> HOST_SH:          /bin/sh
===> TOOLDIR path:     /usr/src/../tools
===> DESTDIR path:     /usr/src/../obj/destdir.i386
===> RELEASEDIR path:  /usr/src/../obj/releasedir
===> makewrapper:      /usr/src/../tools/bin/nbmake-i386
===> Updated /usr/src/../tools/bin/nbmake-i386
installsets ===> distrib/sets   (with: INSTALLDIR=/ INSTALLSETS=)
nbmake: don't know how to make /usr/src/../obj/destdir.i386/METALOG. Stop

nbmake: stopped in /usr/src/distrib/sets

*** Failed target:  installworld
*** Failed command: _makedirtarget() { dir="$1"; shift; target="$1";
shift; case "${dir}" in /*) this="${dir}/"; real="${dir}" ;; .)
this=""; real="/usr/src" ;; *) this="${dir}/"; real="/usr/src/${dir}"
;; esac; show=${this:-.}; echo "${target} ===> ${show%/}${1:+ (with:
$@)}"; cd "${real}" && /usr/src/../tools/bin/nbmake
_THISDIR_="${this}" "$@" ${target}; }; _makedirtarget distrib/sets
installsets INSTALLDIR=/ INSTALLSETS=
*** Error code 2

Stop.
nbmake: stopped in /usr/src

ERROR: Failed to make installworld to /
*** BUILD ABORTED ***