Tools target and vi-tabcomplete

I am using KSH, and have the following options set:

  $ set +o
  set -o interactive -o monitor -o nohup -o posix -o stdin
-o vi -o
  vi-tabcomplete

when trying to re-build tools with:

  $ ./build.sh -u -U -O obj tools

I get the following badness while building groff:

  [...]
  dependall ===> groff
  configure: WARNING: you should use --build, --host,
--target
  checking for vi-tabcomplete-gcc... cc
  [...]
  checking for vi-tabcomplete-g++... c++
  [...]
  checking for vi-tabcomplete-ranlib... ranlib
  [...]
  checking for vi-tabcomplete-gs... no
  checking for vi-tabcomplete-gswin32c... no
  checking for vi-tabcomplete-gsos2... no
  [...]
  configure: creating ./config.status
  config.status: error: invalid argument: vi-tabcomplete

  *** Failed target:  .configure_done
  *** Failed command: (cd build && CC=cc CFLAGS=-O
CPPFLAGS=\
  -I/usr/src/obj/tools
  /compat\ -I/usr/src/obj/tools/compat/include\ \
  -I/usr/src/tools/groff/../compat
  \ -DHAVE_NBTOOL_CONFIG_H=1\ \ -D_FILE_OFFSET_BITS=64
CXX=c++
  CXXFLAGS=-O INSTALL
  =/usr/src/obj/tooldir.NetBSD-3.99.20-i386/bin/nbinstall\
-c\ -p\ -r
  LDFLAGS= AR=
  ar RANLIB=ranlib
  LEX=/usr/src/obj/tooldir.NetBSD-3.99.20-i386/bin/nblex
MAKE=/us
  r/src/obj/tooldir.NetBSD-3.99.20-i386/bin/nbmake
  PATH="/usr/src/obj/tooldir.NetB
  SD-3.99.20-i386/bin:$PATH"
  YACC=/usr/src/obj/tooldir.NetBSD-3.99.20-i386/bin/nby
  acc sh /usr/src/tools/groff/../../gnu/dist/groff/configure
--without-x
  --prefix=
  /usr/src/obj/tooldir.NetBSD-3.99.20-i386)
  *** Error code 1

  Stop.
  nbmake: stopped in /usr/src/tools/grof


Looks to me like some memory mangling is ruining my fun...
is this
PR-worthy?

-- 
  .oliver