build.sh problem

[vincent <10.50%free.fr@localhost>]

Hi there,
following the advice of Thor, Quentin et al. I wept all my src tree  
clean and started anew.

I have a fresh tree.

When I try:

./build.sh -D bsd -T tools -O obj build

I got this:

===> build.sh command: ./build.sh -D bsd -T tools -O obj build
===> build.sh started: Fri Apr  3 11:43:00 CEST 2009
===> NetBSD version:   5.99.9
===> MACHINE:          amd64
===> MACHINE_ARCH:     x86_64
===> Build platform:   NetBSD 5.99.01 amd64
===> HOST_SH:          /bin/sh
===> No /usr/src/tools/bin/nbmake, needs building.
===> Bootstrapping nbmake
/bin/sh: Can't open /usr/src/tools/make/configure

ERROR: Configure of nbmake failed
*** BUILD ABORTED ***

There is no parastical environnement variables defined, so I cannot  
figure out why the script looks for configure in the tools directory  
which is, like obj, empty.

If anyone could help me, thanks a lot.
Vincent