diff --git a/build.sh b/build.sh
index 04151aa..a24f976 100755
--- a/build.sh
+++ b/build.sh
@@ -42,6 +42,6 @@ for NAME in "${PACKAGES[@]}" ; do
 	cd $pwd
 done
 
-if [ "x$1" == "x" ] ; then
+if ! [ "x$1" == "x" ] ; then
 	rsync -av $BUILDDIR/packages/$VERSION $1
 fi