--- a/setup.py	Sat Nov 30 19:12:02 2024 +0100
+++ b/setup.py	Fri Nov 29 22:59:16 2024 +0100
@@ -1663,7 +1663,7 @@
         'librusthg',
     ),
     RustStandaloneExtension(
-        'mercurial.pyo3-rustext',
+        'mercurial.pyo3_rustext',
         'hg-pyo3',
         'librusthgpyo3',
     ),