diff -r e9ced84aeef4 -r 0f9ed7e7a71b rust/hg-pyo3/src/lib.rs
--- a/rust/hg-pyo3/src/lib.rs	Fri Feb 07 16:07:39 2025 -0500
+++ b/rust/hg-pyo3/src/lib.rs	Fri Dec 20 20:40:09 2024 +0100
@@ -9,14 +9,12 @@
 
 #[pymodule]
 fn pyo3_rustext(py: Python<'_>, m: &Bound<'_, PyModule>) -> PyResult<()> {
+    m.add("__package__", "mercurial")?;
     m.add(
         "__doc__",
         "Mercurial core concepts - Rust implementation exposed via PyO3",
     )?;
-    // the module's __name__ is pyo3_rustext, not mercurial.pyo3_rustext
-    // (at least at this point).
-    let name: String = m.getattr("__name__")?.extract()?;
-    let dotted_name = format!("mercurial.{}", name);
+    let dotted_name: String = m.getattr("__name__")?.extract()?;
 
     m.add_submodule(&ancestors::init_module(py, &dotted_name)?)?;
     m.add_submodule(&dagops::init_module(py, &dotted_name)?)?;