diff --git a/buildman/manager/ephemeral.py b/buildman/manager/ephemeral.py
index ac603b9ce..63f03a6b7 100644
--- a/buildman/manager/ephemeral.py
+++ b/buildman/manager/ephemeral.py
@@ -191,7 +191,7 @@ class EphemeralBuilderManager(BaseManager):
     logger.debug('Calling job_completed with status: %s', job_status)
 
     # Kill the ephmeral builder
-    self._executor.stop_builder(self._component_to_builder.pop(build_component))
+    yield From(self._executor.stop_builder(self._component_to_builder.pop(build_component)))
 
     # Release the lock in etcd
     job_key = self._etcd_job_key(build_job)