diff --git a/gl/ref-add.sed b/gl/ref-add.sed
--- /dev/null
+++ b/gl/ref-add.sed
@@ -0,0 +1,10 @@
+/^# Packages using this file: / {
+ s/# Packages using this file://
+ ta
+ :a
+ s/ nagios-plugins / nagios-plugins /
+ tb
+ s/ $/ nagios-plugins /
+ :b
+ s/^/# Packages using this file:/
+}