--- a/docs/conf.py	Fri Mar 06 21:37:28 2020 +0700
+++ b/docs/conf.py	Fri Mar 06 14:35:35 2020 -0800
@@ -7,6 +7,7 @@
 from mercurial import ui
 from mercurial import extensions as hgext
 from mercurial import commands
+from mercurial import pycompat
 import os
 
 extensions = ["sphinx.ext.graphviz"]
@@ -143,11 +144,13 @@
         if not hasattr(u, 'disablepager'):
             return []
         u.disablepager()
-        u.setconfig(
-            'extensions', 'evolve',
-            os.path.join(
-                os.path.abspath(os.path.dirname(__file__)),
-                os.pardir, 'hgext3rd', 'evolve'))
+        import sys
+        print('version', sys.version_info)
+        print('__file__', type(__file__).__name__)
+        evolve_path = os.path.join(
+            os.path.abspath(os.path.dirname(__file__)),
+            os.pardir, 'hgext3rd', 'evolve')
+        u.setconfig(b'extensions', b'evolve', pycompat.fsencode(evolve_path))
         hgext.loadall(u)
         u.pushbuffer()
         commands.help_(u, self.content[0].encode('utf-8'))