diff --git a/docs/source/conf.py b/docs/source/conf.py
index 04199b5d..0dc589bc 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -54,8 +54,8 @@ exclude_patterns = [
     ".DS_Store",
 ]
 
-#if not os.environ.get("BUILD_ALL"):
-#    exclude_patterns.append("_obsolete/**")
+if not os.environ.get("BUILD_ALL"):
+    exclude_patterns.append("_obsolete/**")
 
 def setup(app):
     if os.environ.get('BUILD_ALL'):