Fix canonicalization

Author: di

setuptools/dist.py

@@ -973,7 +973,7 @@ def run_command(self, command):
     def _override_get_fullname(self):
         def _get_fullname_canonicalized(self):
             return "{}-{}".format(
-                canonicalize_name(self.get_name()),
+                canonicalize_name(self.get_name()).replace('-', '_'),
                 canonicalize_version(self.get_version()),
             )
 

setuptools/tests/test_config_discovery.py

@@ -278,7 +278,7 @@ def test_build_with_discovered_name(self, tmp_path):
         _run_build(tmp_path, "--sdist")
         # Expected distribution file
         dist_file = (
-            tmp_path / f"dist/ns-nested-pkg-{self.CANONICAL_DEFAULT_VERSION}.tar.gz"
+            tmp_path / f"dist/ns_nested_pkg-{self.CANONICAL_DEFAULT_VERSION}.tar.gz"
         )
         assert dist_file.is_file()