diff --git a/update_pins.py b/update_pins.py
index 4f68b57..668808f 100755
--- a/update_pins.py
+++ b/update_pins.py
@@ -1,4 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/env nix-shell
+#!nix-shell -i python3 -p 'python3.withPackages (ps: [ ps.requests ])'
 """
 Updates pins in this repo to their latest version.