diff --git a/stubs/setuptools/METADATA.toml b/stubs/setuptools/METADATA.toml
index 580c46f519b9..4595928ea56d 100644
--- a/stubs/setuptools/METADATA.toml
+++ b/stubs/setuptools/METADATA.toml
@@ -1,4 +1,4 @@
-version = "75.2.*"
+version = "75.3.*"
 upstream_repository = "https://github.com/pypa/setuptools"
 extra_description = """\
 If using `setuptools >= 71.1` *only* for `pkg_resources`,
diff --git a/stubs/setuptools/setuptools/__init__.pyi b/stubs/setuptools/setuptools/__init__.pyi
index c2a24d44ce03..8bba3da5b5ad 100644
--- a/stubs/setuptools/setuptools/__init__.pyi
+++ b/stubs/setuptools/setuptools/__init__.pyi
@@ -31,7 +31,7 @@ from .dist import Distribution as Distribution
 from .extension import Extension as Extension
 from .warnings import SetuptoolsDeprecationWarning as SetuptoolsDeprecationWarning
 
-_CommandT = TypeVar("_CommandT", bound=Command)
+_CommandT = TypeVar("_CommandT", bound=_Command)
 
 __all__ = [
     "setup",
diff --git a/stubs/setuptools/setuptools/build_meta.pyi b/stubs/setuptools/setuptools/build_meta.pyi
index 758a2bdb9b6a..bfc403ef9e77 100644
--- a/stubs/setuptools/setuptools/build_meta.pyi
+++ b/stubs/setuptools/setuptools/build_meta.pyi
@@ -32,7 +32,7 @@ class _BuildMetaBackend:
     def run_setup(self, setup_script: str = "setup.py") -> None: ...
     def get_requires_for_build_wheel(self, config_settings: _ConfigSettings = None) -> list[str]: ...
     def get_requires_for_build_sdist(self, config_settings: _ConfigSettings = None) -> list[str]: ...
-    def prepare_metadata_for_build_wheel(self, metadata_directory: str, config_settings: _ConfigSettings = None) -> str: ...
+    def prepare_metadata_for_build_wheel(self, metadata_directory: StrPath, config_settings: _ConfigSettings = None) -> str: ...
     def build_wheel(
         self, wheel_directory: StrPath, config_settings: _ConfigSettings = None, metadata_directory: StrPath | None = None
     ) -> str: ...
@@ -41,7 +41,9 @@ class _BuildMetaBackend:
         self, wheel_directory: StrPath, config_settings: _ConfigSettings = None, metadata_directory: StrPath | None = None
     ) -> str: ...
     def get_requires_for_build_editable(self, config_settings: _ConfigSettings = None) -> list[str]: ...
-    def prepare_metadata_for_build_editable(self, metadata_directory: str, config_settings: _ConfigSettings = None) -> str: ...
+    def prepare_metadata_for_build_editable(
+        self, metadata_directory: StrPath, config_settings: _ConfigSettings = None
+    ) -> str: ...
 
 class _BuildMetaLegacyBackend(_BuildMetaBackend):
     def run_setup(self, setup_script: str = "setup.py") -> None: ...
diff --git a/stubs/setuptools/setuptools/command/bdist_egg.pyi b/stubs/setuptools/setuptools/command/bdist_egg.pyi
index 6120d3b6c2ff..02e498367689 100644
--- a/stubs/setuptools/setuptools/command/bdist_egg.pyi
+++ b/stubs/setuptools/setuptools/command/bdist_egg.pyi
@@ -1,9 +1,12 @@
-from _typeshed import Incomplete
+from _typeshed import Incomplete, StrPath
 from collections.abc import Generator
-from typing import ClassVar, Final
+from typing import ClassVar, Final, TypeVar
+from zipfile import _ZipFileMode
 
 from .. import Command
 
+_StrPathT = TypeVar("_StrPathT", bound=StrPath)
+
 def strip_module(filename): ...
 def sorted_walk(dir) -> Generator[Incomplete, None, None]: ...
 def write_stub(resource, pyfile) -> None: ...
@@ -48,5 +51,10 @@ def can_scan(): ...
 INSTALL_DIRECTORY_ATTRS: Final[list[str]]
 
 def make_zipfile(
-    zip_filename, base_dir, verbose: bool = False, dry_run: bool = False, compress: bool = True, mode: str = "w"
-): ...
+    zip_filename: _StrPathT,
+    base_dir,
+    verbose: bool = False,
+    dry_run: bool = False,
+    compress: bool = True,
+    mode: _ZipFileMode = "w",
+) -> _StrPathT: ...
diff --git a/stubs/setuptools/setuptools/command/bdist_wheel.pyi b/stubs/setuptools/setuptools/command/bdist_wheel.pyi
index 4bba3e97406c..70025a98b5a8 100644
--- a/stubs/setuptools/setuptools/command/bdist_wheel.pyi
+++ b/stubs/setuptools/setuptools/command/bdist_wheel.pyi
@@ -40,7 +40,7 @@ class bdist_wheel(Command):
     owner: Incomplete | None
     group: Incomplete | None
     universal: bool
-    compression: int | str
+    compression: str | int
     python_tag: str
     build_number: str | None
     py_limited_api: str | Literal[False]
diff --git a/stubs/setuptools/setuptools/command/build_py.pyi b/stubs/setuptools/setuptools/command/build_py.pyi
index 77a2821d5c9f..64eca7a74c70 100644
--- a/stubs/setuptools/setuptools/command/build_py.pyi
+++ b/stubs/setuptools/setuptools/command/build_py.pyi
@@ -1,4 +1,4 @@
-from _typeshed import Incomplete, StrPath
+from _typeshed import Incomplete, StrPath, Unused
 from typing import ClassVar
 
 from setuptools.dist import Distribution
@@ -21,7 +21,7 @@ class build_py(orig.build_py):
         preserve_mode: bool = True,
         preserve_times: bool = True,
         link: str | None = None,
-        level: int = 1,
+        level: Unused = 1,
     ) -> tuple[_StrPathT | str, bool]: ...
     def run(self) -> None: ...
     data_files: list[tuple[Incomplete, Incomplete, Incomplete, list[Incomplete]]]
diff --git a/stubs/setuptools/setuptools/command/editable_wheel.pyi b/stubs/setuptools/setuptools/command/editable_wheel.pyi
index 482e679d30c3..bcbec3e17ad6 100644
--- a/stubs/setuptools/setuptools/command/editable_wheel.pyi
+++ b/stubs/setuptools/setuptools/command/editable_wheel.pyi
@@ -33,11 +33,11 @@ class editable_wheel(Command):
     def run(self) -> None: ...
 
 class EditableStrategy(Protocol):
-    def __call__(self, wheel: _WheelFile, files: list[str], mapping: Mapping[str, str]) -> None: ...
+    def __call__(self, wheel: _WheelFile, files: list[str], mapping: Mapping[str, str]) -> Unused: ...
     def __enter__(self) -> Self: ...
     def __exit__(
         self, _exc_type: type[BaseException] | None, _exc_value: BaseException | None, _traceback: TracebackType | None
-    ) -> None: ...
+    ) -> Unused: ...
 
 class _StaticPth:
     dist: Distribution
diff --git a/stubs/setuptools/setuptools/command/install.pyi b/stubs/setuptools/setuptools/command/install.pyi
index 99472f199758..064c11a6dd69 100644
--- a/stubs/setuptools/setuptools/command/install.pyi
+++ b/stubs/setuptools/setuptools/command/install.pyi
@@ -11,7 +11,7 @@ class install(orig.install):
     user_options: ClassVar[list[tuple[str, str | None, str]]]
     boolean_options: ClassVar[list[str]]
     # Any to work around variance issues
-    new_commands: list[tuple[str, Callable[[Any], bool]] | None]
+    new_commands: ClassVar[list[tuple[str, Callable[[Any], bool]] | None]]
     old_and_unmanageable: Incomplete
     single_version_externally_managed: bool | None
     def initialize_options(self) -> None: ...
diff --git a/stubs/setuptools/setuptools/config/expand.pyi b/stubs/setuptools/setuptools/config/expand.pyi
index 78c53c5e641f..c57ed4d46229 100644
--- a/stubs/setuptools/setuptools/config/expand.pyi
+++ b/stubs/setuptools/setuptools/config/expand.pyi
@@ -8,7 +8,7 @@ from typing_extensions import Self
 from ..dist import Distribution
 
 _K = TypeVar("_K")
-_VCo = TypeVar("_VCo", covariant=True)
+_V_co = TypeVar("_V_co", covariant=True)
 
 class StaticModule:
     def __init__(self, name: str, spec: ModuleSpec) -> None: ...
@@ -31,7 +31,7 @@ def canonic_package_data(package_data: dict[Incomplete, Incomplete]) -> dict[Inc
 def canonic_data_files(
     data_files: list[Incomplete] | dict[Incomplete, Incomplete], root_dir: StrPath | None = None
 ) -> list[tuple[str, list[str]]]: ...
-def entry_points(text: str, text_source: str = "entry-points") -> dict[str, dict[Incomplete, Incomplete]]: ...
+def entry_points(text: str, text_source: str = "entry-points") -> dict[str, dict[str, str]]: ...
 
 class EnsurePackagesDiscovered:
     def __init__(self, distribution: Distribution) -> None: ...
@@ -43,8 +43,8 @@ class EnsurePackagesDiscovered:
     @property
     def package_dir(self) -> Mapping[str, str]: ...
 
-class LazyMappingProxy(Mapping[_K, _VCo]):
-    def __init__(self, obtain_mapping_value: Callable[[], Mapping[_K, _VCo]]) -> None: ...
-    def __getitem__(self, key: _K) -> _VCo: ...
+class LazyMappingProxy(Mapping[_K, _V_co]):
+    def __init__(self, obtain_mapping_value: Callable[[], Mapping[_K, _V_co]]) -> None: ...
+    def __getitem__(self, key: _K) -> _V_co: ...
     def __len__(self) -> int: ...
     def __iter__(self) -> Iterator[_K]: ...
diff --git a/stubs/setuptools/setuptools/config/setupcfg.pyi b/stubs/setuptools/setuptools/config/setupcfg.pyi
index d54e32d5de05..7d0cabbd9665 100644
--- a/stubs/setuptools/setuptools/config/setupcfg.pyi
+++ b/stubs/setuptools/setuptools/config/setupcfg.pyi
@@ -1,4 +1,5 @@
 from _typeshed import Incomplete, StrPath
+from collections.abc import Iterable
 from typing import Any, ClassVar, Generic, TypeVar
 from typing_extensions import TypeAlias
 
@@ -8,14 +9,14 @@ from . import expand
 
 SingleCommandOptions: TypeAlias = dict[str, tuple[str, Any]]
 AllCommandOptions: TypeAlias = dict[str, SingleCommandOptions]
-Target = TypeVar("Target", bound=Distribution | DistributionMetadata)  # noqa: Y001 # Exists at runtime
+Target = TypeVar("Target", Distribution, DistributionMetadata)  # noqa: Y001 # Exists at runtime
 
 def read_configuration(
     filepath: StrPath, find_others: bool = False, ignore_option_errors: bool = False
 ) -> dict[Incomplete, Incomplete]: ...
 def apply_configuration(dist: Distribution, filepath: StrPath) -> Distribution: ...
 def configuration_to_dict(
-    handlers: tuple[ConfigHandler[Distribution | DistributionMetadata], ...]
+    handlers: Iterable[ConfigHandler[Distribution] | ConfigHandler[DistributionMetadata]],
 ) -> dict[Incomplete, Incomplete]: ...
 def parse_configuration(
     distribution: Distribution, command_options: AllCommandOptions, ignore_option_errors: bool = False
@@ -47,7 +48,7 @@ class ConfigMetadataHandler(ConfigHandler[DistributionMetadata]):
     aliases: ClassVar[dict[str, str]]
     strict_mode: bool
     package_dir: dict[Incomplete, Incomplete] | None
-    root_dir: StrPath
+    root_dir: StrPath | None
     def __init__(
         self,
         target_obj: DistributionMetadata,
@@ -55,7 +56,7 @@ class ConfigMetadataHandler(ConfigHandler[DistributionMetadata]):
         ignore_option_errors: bool,
         ensure_discovered: expand.EnsurePackagesDiscovered,
         package_dir: dict[Incomplete, Incomplete] | None = None,
-        root_dir: StrPath = ".",
+        root_dir: StrPath | None = ".",
     ) -> None: ...
     @property
     def parsers(self): ...
diff --git a/stubs/setuptools/setuptools/discovery.pyi b/stubs/setuptools/setuptools/discovery.pyi
index 90f87b8491a3..9059a381f578 100644
--- a/stubs/setuptools/setuptools/discovery.pyi
+++ b/stubs/setuptools/setuptools/discovery.pyi
@@ -1,12 +1,10 @@
 import itertools
 from _typeshed import Incomplete, StrPath
-from collections.abc import Iterable, Iterator, Mapping
+from collections.abc import Iterable, Mapping
 from typing import ClassVar
-from typing_extensions import TypeAlias
 
 from . import Distribution
 
-StrIter: TypeAlias = Iterator[str]
 chain_iter = itertools.chain.from_iterable
 
 class _Filter:
diff --git a/stubs/setuptools/setuptools/dist.pyi b/stubs/setuptools/setuptools/dist.pyi
index cbe36414d8e6..ea4bf2a92f81 100644
--- a/stubs/setuptools/setuptools/dist.pyi
+++ b/stubs/setuptools/setuptools/dist.pyi
@@ -3,6 +3,7 @@ from collections.abc import Iterable, Iterator, MutableMapping
 from typing import Literal, TypeVar, overload
 
 from . import Command, SetuptoolsDeprecationWarning
+from ._distutils.cmd import Command as _Command
 from ._distutils.dist import Distribution as _Distribution
 from .command.alias import alias
 from .command.bdist_egg import bdist_egg
@@ -26,7 +27,7 @@ from .command.saveopts import saveopts
 from .command.sdist import sdist
 from .command.setopt import setopt
 
-_CommandT = TypeVar("_CommandT", bound=Command)
+_CommandT = TypeVar("_CommandT", bound=_Command)
 
 __all__ = ["Distribution"]
 
diff --git a/stubs/setuptools/setuptools/extension.pyi b/stubs/setuptools/setuptools/extension.pyi
index 6cb7d7aad9dd..ff352d3dc6c6 100644
--- a/stubs/setuptools/setuptools/extension.pyi
+++ b/stubs/setuptools/setuptools/extension.pyi
@@ -1,3 +1,5 @@
+from _typeshed import StrPath
+
 from ._distutils.extension import Extension as _Extension
 
 def have_pyrex() -> bool: ...
@@ -7,7 +9,7 @@ class Extension(_Extension):
     def __init__(
         self,
         name: str,
-        sources: list[str],
+        sources: list[StrPath],
         include_dirs: list[str] | None = None,
         define_macros: list[tuple[str, str | None]] | None = None,
         undef_macros: list[str] | None = None,
diff --git a/stubs/setuptools/setuptools/sandbox.pyi b/stubs/setuptools/setuptools/sandbox.pyi
index 54b155308fbc..a1c47b0eb7c0 100644
--- a/stubs/setuptools/setuptools/sandbox.pyi
+++ b/stubs/setuptools/setuptools/sandbox.pyi
@@ -1,5 +1,4 @@
 import sys
-from _typeshed import Unused
 from types import TracebackType
 from typing import ClassVar, Literal
 from typing_extensions import Self
@@ -23,7 +22,9 @@ def run_setup(setup_script, args): ...
 
 class AbstractSandbox:
     def __enter__(self) -> None: ...
-    def __exit__(self, exc_type: Unused, exc_value: Unused, traceback: Unused) -> None: ...
+    def __exit__(
+        self, exc_type: type[BaseException] | None, exc_value: BaseException | None, traceback: TracebackType | None
+    ) -> None: ...
     def run(self, func): ...
     # Dynamically created
     if sys.platform == "win32":