I can't seem to install a freshly built netbsd-2 system from a read only
src and obj tree.  I did the ./build.sh distribution dance, with sources in
/cvs/src and binaries in /cvs/obj, reboot the new kernel into single user
mode, mount everything read-write, except /cvs read-only, and did
./build.sh install=/.  But build.sh attemps to rebuild nbmake and write the
binary into the tools dir (although an up-to-date nbmake is obviously
already there), so I get an error.  Setting MKUPDATE=yes doesn't help.  

How can I prevent ./build.sh install from rebuilding nbmake?  (I think
there is no case where it should, is there?)  

GH