diff --git a/setuptools_rust/build.py b/setuptools_rust/build.py
index 8f0afcfe..9a039ca3 100644
--- a/setuptools_rust/build.py
+++ b/setuptools_rust/build.py
@@ -20,6 +20,7 @@
 from typing import Dict, Iterable, List, NamedTuple, Optional, Set, Tuple, cast
 
 import pkg_resources
+from semantic_version import Version
 from setuptools.command.build import build as CommandBuild  # type: ignore[import]
 from setuptools.command.build_ext import build_ext as CommandBuildExt
 from setuptools.command.build_ext import get_abi3_suffix
@@ -31,10 +32,9 @@
 from .rustc_info import (
     get_rust_host,
     get_rust_target_list,
-    get_rustc_cfgs,
     get_rust_version,
+    get_rustc_cfgs,
 )
-from semantic_version import Version
 
 
 def _check_cargo_supports_crate_type_option() -> bool:
@@ -108,8 +108,10 @@ def finalize_options(self) -> None:
 
     def get_data_dir(self) -> str:
         components = (
-            pkg_resources.safe_name(self.distribution.get_name()).replace("-", "_"),  # type: ignore[attr-defined]
-            pkg_resources.safe_version(self.distribution.get_version()).replace("-", "_"),  # type: ignore[attr-defined]
+            pkg_resources.safe_name(self.distribution.get_name()).replace("-", "_"),
+            pkg_resources.safe_version(self.distribution.get_version()).replace(
+                "-", "_"
+            ),
         )
         if self.build_number:
             components += (self.build_number,)
diff --git a/setuptools_rust/setuptools_ext.py b/setuptools_rust/setuptools_ext.py
index 8ce281e1..ab51d165 100644
--- a/setuptools_rust/setuptools_ext.py
+++ b/setuptools_rust/setuptools_ext.py
@@ -275,10 +275,8 @@ def rust_extensions(
     has_rust_extensions = len(value) > 0
 
     # Monkey patch has_ext_modules to include Rust extensions.
-    #
-    # has_ext_modules is missing from Distribution typing.
-    orig_has_ext_modules = dist.has_ext_modules  # type: ignore[attr-defined]
-    dist.has_ext_modules = lambda: (orig_has_ext_modules() or has_rust_extensions)  # type: ignore[attr-defined]
+    orig_has_ext_modules = dist.has_ext_modules
+    dist.has_ext_modules = lambda: (orig_has_ext_modules() or has_rust_extensions)  # type: ignore[method-assign]
 
     if has_rust_extensions:
         add_rust_extension(dist)