1diff --git a/util.py b/util.py
2index bfec1ed..5147757 100644
3--- a/util.py
4+++ b/util.py
5@@ -132,6 +132,7 @@ def check_update(current_version):
6
7
8 def update(current_version):
9+ return "Can't update Nix installation at runtime"
10 global log
11
12 target = var.config.get('bot', 'target_version')