--- a/lib/pvl/apply.sh	Tue Mar 03 11:58:10 2015 +0200
+++ b/lib/pvl/apply.sh	Tue Mar 03 12:08:58 2015 +0200
@@ -49,7 +49,7 @@
 
     if [ ${#@} -eq 1 ]; then
         debug "  update: empty deps"
-        return 0
+        return 2
 
     elif [ ! -e "$out" ]; then
         debug "  update: dest missing"