gistfile1

diff --git a/hlbb/zulip_status.py b/hlbb/zulip_status.py
index f37f978..b91c573 100644
--- a/hlbb/zulip_status.py
+++ b/hlbb/zulip_status.py
@@ -92,6 +92,14 @@ class _ZulipWriteOnlyStatus(StatusReceiverService):
         self.zulip = zulip
 
 
+    def startService(self):
+        self.parent.subscribe(self)
+
+
+    def stopService(self):
+        self.parent.unsubscribe(self)
+
+
     def buildFinished(self, buildName, build, results):
         """
         Announce completed builds.
@@ -112,7 +120,7 @@ class _ZulipWriteOnlyStatus(StatusReceiverService):
             buildNumber=build.getNumber(), builderName=builder.getName(),
             result=build.getResults())
 
-        subject = build.XXX
+        sourcestamp = build.getSourceStamps()
 
         self.zulip.send(
             type=b"stream",