diff --git a/scripts/lib/install b/scripts/lib/install
index 400bc33004..7d0faa9c4f 100755
--- a/scripts/lib/install
+++ b/scripts/lib/install
@@ -43,11 +43,16 @@ while true; do
             shift
             ;;
         --)
+            shift
             break
             ;;
     esac
 done
 
+if [ "$#" -gt 0 ]; then
+    usage
+fi
+
 if [ -n "$show_help" ]; then
     usage
 fi