diff --git a/tools/build.sh b/tools/build.sh
index da11b89d39a111034099322c21659da8c1b3dfcc..c58628dbcf29c8233faaa090133014cf72be410d 100755
--- a/tools/build.sh
+++ b/tools/build.sh
@@ -80,7 +80,7 @@ buildit ()
 	$TIMER $TOOLDIR/build-world.sh $TARGET $OLDLISP $BOOT
 	(cd $TARGET/lisp; make)
 	#$TOOLDIR/build-world.sh $TARGET $OLDLISP
-	$TOOLDIR/load-world.sh $TARGET $VERSION
+	sh -x $TOOLDIR/load-world.sh $TARGET "$VERSION"
 	if [ ! -f $TARGET/lisp/lisp.core ]; then
 	    echo "Failed to build $TARGET!"
 	    exit 1