setup.py

--- a/setup.py	Wed Nov 23 20:59:53 2022 -0500
+++ b/setup.py	Wed Nov 23 21:11:46 2022 -0500
@@ -1607,6 +1607,10 @@
     'mercurial.helptext.internals': [
         '*.txt',
     ],
+    'mercurial.thirdparty.attr': [
+        '*.pyi',
+        'py.typed',
+    ],
 }