diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -812,6 +812,8 @@
             'mercurial.thirdparty.attr',
             'mercurial.thirdparty.cbor',
             'mercurial.thirdparty.cbor.cbor2',
+            'mercurial.thirdparty.concurrent',
+            'mercurial.thirdparty.concurrent.futures',
             'mercurial.thirdparty.zope',
             'mercurial.thirdparty.zope.interface',
             'mercurial.utils',