Fix a missing import bug.

diff --git a/lockfile.py b/lockfile.py
index ca190df09f9245bca7153945f0fee61859daa1d7..d275f407ff237c38ceaec83c94a1abf92174b04a 100644 (file)
--- a/lockfile.py
+++ b/lockfile.py
@@ -10,6 +10,7 @@ import sys
 from typing import Optional
 
 import config
+import datetime_utils
 import decorator_utils