diff --git a/muppet/output.py b/muppet/output.py
index 9f7f54f4a200c7bad2e58804e4a81af42248a130..20ffd430d9d0805a57f3306721300add4c5b9757 100644
--- a/muppet/output.py
+++ b/muppet/output.py
@@ -249,8 +249,14 @@ def setup_module_index(*,
         'list': [],
     })
 
+    crumbs = breadcrumbs(
+            ('Environment', ''),
+            module.name,
+            )
+
     with open(os.path.join(base, 'index.html'), 'w') as f:
         f.write(template.render(module_name=module.name,
+                                breadcrumbs=crumbs,
                                 content=content,
                                 path_base=path_base,
                                 doc_files=doc_files.items()))