--- llvm-9.0.1.src/tools/lld/docs/conf.py.orig	2019-12-30 19:06:39.896000000 +0100
+++ llvm-9.0.1.src/tools/lld/docs/conf.py	2019-12-30 19:05:48.263000000 +0100
@@ -134,7 +134,7 @@
 #html_use_smartypants = True
 
 # Custom sidebar templates, maps document names to template names.
-html_sidebars = {'index': 'indexsidebar.html'}
+html_sidebars = {'index': ['indexsidebar.html']}
 
 # Additional templates that should be rendered to pages, maps page names to
 # template names.