Compiling the current source code

[Camilo Reyes <camiloreyes82%yahoo.com@localhost>]

I recently checked out the current sources. The NetBSD Guide says to do
./build.sh -U distribution to upgrade my system. The problem I'm having is
an error message that says my obj files are missing. any clue on what to
do? I've read the guide and there is no mention of them. Thnx.
BSDOBJDIR /usr/obj does not exist, bailing...
*** Failed target:  obj
*** Failed command: cd /usr/src/tools; here=`/bin/pwd`/; 
subdir=${here#/usr/src/}; if [ "$here" != "$subdir" ]; then if [ ! -d /usr/obj 
]; then echo "BSDOBJDIR /usr/obj does not exist, bailing..."; exit 1; fi; 
subdir=${subdir%/}; dest=/usr/obj/$subdir; if [ -x 
/usr/src/tooldir.NetBSD-4.0-i386/bin/nbstat ] && 
ttarg=`/usr/src/tooldir.NetBSD-4.0-i386/bin/nbstat -qf '%Y' ${here}obj` && [ 
"$dest" = "$ttarg" ]; then : ; else echo '# ' " objdir $dest"; rm -rf obj; ln 
-s $dest obj; fi; if [ ! -d $dest ]; then mkdir -p $dest; else true; fi; else 
true ; dest=${here}obj ; if [ ! -d obj ] || [ -h obj ]; then echo '# ' " objdir 
$dest"; rm -f obj; mkdir $dest; fi ; fi;
*** Error code 1
Stop.
nbmake: stopped in /usr/src/tools
ERROR: Failed to make obj in tools
*** BUILD ABORTED ***