diff --git a/buildbot_nix/__init__.py b/buildbot_nix/__init__.py
index e416770..aa66e54 100644
--- a/buildbot_nix/__init__.py
+++ b/buildbot_nix/__init__.py
@@ -3,6 +3,7 @@ import multiprocessing
 import os
 import sys
 import graphlib
+import base64
 from collections.abc import Generator
 from dataclasses import dataclass, field
 from pathlib import Path