diff --git a/opt/backup-fs b/opt/backup-fs
index 7e5face..e27efb4 100644
--- a/opt/backup-fs
+++ b/opt/backup-fs
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env bash -i
 
 function yesno {
   unset DISCARD_ME