diff --git a/.taskcluster.yml b/.taskcluster.yml
index ac230c1290d..070d3de7c01 100644
--- a/.taskcluster.yml
+++ b/.taskcluster.yml
@@ -26,7 +26,9 @@ tasks:
 
       payload:
         maxRunTime: 1200
-        image: "buildpack-deps:bionic-scm"
+        # https://hub.docker.com/r/servobrowser/decision-task/builds/
+        # https://github.com/SimonSapin/servo-decision-task-image
+        image: "servobrowser/decision-task@sha256:8c9b4de60fc584828ae9a297a780945c2aa505d3b037ead3907554ab2e16aced"
         features:
           taskclusterProxy: true
         env:
diff --git a/decision-task/run.py b/decision-task/run.py
index a2f8caf83e3..512e298121e 100644
--- a/decision-task/run.py
+++ b/decision-task/run.py
@@ -3,9 +3,6 @@
 import os
 import sys
 import json
-
-sys.path.insert(0, os.path.join(os.path.dirname(__file__), "vendored"))
-
 import taskcluster
 
 decision_task_id = os.environ["TASK_ID"]