diff --git a/contrib/buildbot/server.py b/contrib/buildbot/server.py
--- a/contrib/buildbot/server.py
+++ b/contrib/buildbot/server.py
@@ -219,7 +219,7 @@
 
         # Get the configuration from master
         config = yaml.safe_load(phab.get_file_content_from_master(
-            "contrib/teamcity/build-configurations.yaml"))
+            "contrib/teamcity/build-configurations.yml"))
 
         # Get a list of the builds that should run on diffs
         builds = [