--- a/setup.py	Sat Dec 05 23:11:49 2020 +0100
+++ b/setup.py	Tue Dec 01 09:13:08 2020 +0100
@@ -1287,6 +1287,7 @@
     'mercurial.thirdparty.attr',
     'mercurial.thirdparty.zope',
     'mercurial.thirdparty.zope.interface',
+    'mercurial.upgrade_utils',
     'mercurial.utils',
     'mercurial.revlogutils',
     'mercurial.testing',