diff --git a/plugins/stack b/plugins/stack
index f142e03..e2b9462 100644
--- a/plugins/stack
+++ b/plugins/stack
@@ -6,6 +6,7 @@
 # Arguments: -purge, -notools, -noptim
 
 source /opt/webinoly/lib/install
+source /opt/webinoly/lib/webin
 opt="$1"
 arg="$2"