diff --git a/src/re2/gen_build_yaml.py b/src/re2/gen_build_yaml.py
index 39f4a00ab95..bdb1f7b544e 100755
--- a/src/re2/gen_build_yaml.py
+++ b/src/re2/gen_build_yaml.py
@@ -29,7 +29,7 @@ out['libs'] = [{
     'name':
         're2',
     'build':
-        'all',
+        'private',
     'language':
         'c',
     'secure':