diff --git a/cbuildbot/repository.py b/cbuildbot/repository.py
index 8402460..a090c9b 100644
--- a/cbuildbot/repository.py
+++ b/cbuildbot/repository.py
@@ -394,6 +394,7 @@
       manifest_repo_url: A new value for manifest_repo_url.
       extra_args: Extra args to pass to 'repo init'
     """
+    self.repo_cmd = '/preload/chromeos/.repo/repo/repo'
     self.AssertNotNested()
 
     if manifest_repo_url: