diff --git a/concourse/build_osx_debug.yml b/concourse/build_osx_debug.yml
index 319c7c4..e775eec 100644
--- a/concourse/build_osx_debug.yml
+++ b/concourse/build_osx_debug.yml
@@ -10,3 +10,4 @@ run:
   - gpos_src/concourse/build_and_test.py
   - --build_type=DEBUG
   - --output_dir=build_and_test_osx_debug/install
+  - --32=true