diff --git a/bin/cbuildbot_config.py b/bin/cbuildbot_config.py
index ce41ae2640..831ef06bd1 100644
--- a/bin/cbuildbot_config.py
+++ b/bin/cbuildbot_config.py
@@ -60,6 +60,7 @@ config['x86-mario-pre-flight-branch'] = {
   'important' : False,
   'unittests' : True,
   'smoke_bvt' : True,
+  'overlays': 'both',
 }
 config['x86_agz_bin'] = {
   'board' : 'x86-agz',