Index: ndn-cxx_0.8.1-bp1/docs/conf.py
===================================================================
--- ndn-cxx_0.8.1-bp1.orig/docs/conf.py
+++ ndn-cxx_0.8.1-bp1/docs/conf.py
@@ -29,7 +29,7 @@ today_fmt = '%Y-%m-%d'
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
 
-needs_sphinx = '4.0'
+needs_sphinx = '1.3'
 extensions = [
     'sphinx.ext.extlinks',
     'sphinx.ext.todo',
@@ -47,6 +47,8 @@ def addExtensionIfExists(extension: str)
 
 addExtensionIfExists('sphinxcontrib.doxylink')
 
+master_doc = 'index'
+
 templates_path = ['_templates']
 exclude_patterns = ['Thumbs.db', '.DS_Store']