diff --git a/tools/package/onos-prep-karaf b/tools/package/onos-prep-karaf
index afda1c2..d1f561c 100755
--- a/tools/package/onos-prep-karaf
+++ b/tools/package/onos-prep-karaf
@@ -56,7 +56,7 @@
 cp -r init $PREFIX
 cp -r etc $PREFIX/$KARAF_DIR/etc/
 
-tar czf $OUT $PREFIX
+zip -q -0 -r $OUT $PREFIX
 
 #FIXME
 # Stage all builtin ONOS apps for factory install