--- a/setup.py	Sun Aug 02 10:08:18 2020 -0700
+++ b/setup.py	Thu Jul 30 22:49:51 2020 -0700
@@ -1628,7 +1628,6 @@
 for root in ('templates',):
     for curdir, dirs, files in os.walk(os.path.join('mercurial', root)):
         curdir = curdir.split(os.sep, 1)[1]
-        dirs[:] = filter(ordinarypath, dirs)
         for f in filter(ordinarypath, files):
             f = os.path.join(curdir, f)
             packagedata['mercurial'].append(f)