diff --git a/.arcconfig b/.arcconfig
--- a/.arcconfig
+++ b/.arcconfig
@@ -1,5 +1,5 @@
 {
-  "phabricator.uri" : "https://phabricator.services.mozilla.com/",
-  "repository.callsign": "RELEASE",
+  "phabricator.uri" : "https://phabricator-dev.allizom.org/",
+  "repository.callsign": "MOZILLACENTRAL",
   "history.immutable": false
 }
diff --git a/python/mach/mach/config.py b/python/mach/mach/config.py
--- a/python/mach/mach/config.py
+++ b/python/mach/mach/config.py
@@ -411,5 +411,7 @@
 
     # Allow attribute access because it looks nice.
     @reraise_attribute_error
     def __getattr__(self, k):
         return self.__getitem__(k)
+
+    Nothing to see here, take 2