From 82a940e2321d4e0f0d15b5064e401da01492a525 Mon Sep 17 00:00:00 2001
From: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Date: Wed, 25 Mar 2026 13:49:03 +0200
Subject: [PATCH] Avoid typing and other imports via TYPE_CHECKING=False and
 __future__.annotations

---
 cibuildwheel/__main__.py                      | 10 +++++---
 cibuildwheel/architecture.py                  | 25 +++++++++++--------
 cibuildwheel/environment.py                   | 12 ++++++---
 cibuildwheel/extra.py                         | 11 +++++---
 cibuildwheel/frontend.py                      |  8 ++++--
 cibuildwheel/logger.py                        | 14 +++++++----
 cibuildwheel/oci_container.py                 | 20 +++++++++------
 cibuildwheel/options.py                       |  8 +++++-
 cibuildwheel/platforms/__init__.py            |  3 ++-
 cibuildwheel/platforms/android.py             | 18 +++++++------
 cibuildwheel/platforms/ios.py                 |  3 ++-
 cibuildwheel/platforms/linux.py               | 15 +++++------
 cibuildwheel/platforms/macos.py               | 24 ++++++++++--------
 cibuildwheel/platforms/pyodide.py             | 18 +++++++------
 cibuildwheel/platforms/windows.py             | 21 +++++++++-------
 cibuildwheel/projectfiles.py                  | 11 +++++---
 cibuildwheel/resources/_cross_venv.py         |  9 +++++--
 .../resources/testing_temp_dir_file.py        |  9 +++++--
 cibuildwheel/schema.py                        |  9 +++++--
 cibuildwheel/selector.py                      | 16 +++++++-----
 cibuildwheel/util/cmd.py                      | 15 +++++++----
 cibuildwheel/util/file.py                     |  8 ++++--
 cibuildwheel/util/helpers.py                  | 14 ++++++-----
 cibuildwheel/util/packaging.py                | 11 +++++---
 cibuildwheel/util/python_build_standalone.py  |  8 ++++--
 cibuildwheel/util/resources.py                |  8 ++++--
 cibuildwheel/venv.py                          |  8 ++++--
 unit_test/get_platform_test.py                |  3 ++-
 unit_test/options_test.py                     |  9 +++++--
 unit_test/options_toml_test.py                |  2 +-
 30 files changed, 229 insertions(+), 121 deletions(-)

diff --git a/cibuildwheel/__main__.py b/cibuildwheel/__main__.py
index 79bc2f252..9feea6c5a 100644
--- a/cibuildwheel/__main__.py
+++ b/cibuildwheel/__main__.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "argparse",
     "cibuildwheel.architecture",
@@ -12,7 +14,6 @@
     "cibuildwheel.util.helpers",
     "cibuildwheel.util.resources",
     "collections",
-    "collections.abc",
     "contextlib",
     "functools",
     "os",
@@ -37,10 +38,8 @@
 import textwrap
 import traceback
 import typing
-from collections.abc import Generator, Iterable, Sequence
 from pathlib import Path
 from tempfile import mkdtemp
-from typing import Any, Literal, TextIO
 
 import cibuildwheel
 import cibuildwheel.util
@@ -56,6 +55,11 @@
 from cibuildwheel.util.helpers import strtobool
 from cibuildwheel.util.resources import read_all_configs
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Generator, Iterable, Sequence
+    from typing import Any, Literal, TextIO
+
 
 @dataclasses.dataclass
 class GlobalOptions:
diff --git a/cibuildwheel/architecture.py b/cibuildwheel/architecture.py
index 130cf47a3..66efb5d30 100644
--- a/cibuildwheel/architecture.py
+++ b/cibuildwheel/architecture.py
@@ -1,7 +1,7 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
-    "cibuildwheel.typing",
     "collections",
-    "collections.abc",
     "platform",
     "re",
     "shutil",
@@ -15,12 +15,17 @@
 import subprocess
 import sys
 import typing
-from collections.abc import Set
 from enum import StrEnum, auto
-from typing import Final, Literal
+from typing import Final
 
 from cibuildwheel import errors
-from cibuildwheel.typing import PlatformName
+
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Set
+    from typing import Literal
+
+    from cibuildwheel.typing import PlatformName
 
 PRETTY_NAMES: Final[dict[PlatformName, str]] = {
     "linux": "Linux",
@@ -94,7 +99,7 @@ class Architecture(StrEnum):
     x86_64_iphonesimulator = auto()
 
     @staticmethod
-    def parse_config(config: str, platform: PlatformName) -> "set[Architecture]":
+    def parse_config(config: str, platform: PlatformName) -> set[Architecture]:
         result = set()
         for arch_str in re.split(r"[\s,]+", config):
             match arch_str:
@@ -118,7 +123,7 @@ def parse_config(config: str, platform: PlatformName) -> "set[Architecture]":
         return result
 
     @staticmethod
-    def native_arch(platform: PlatformName) -> "Architecture | None":
+    def native_arch(platform: PlatformName) -> Architecture | None:
         native_machine = platform_module.machine()
         native_architecture = Architecture(native_machine)
 
@@ -155,7 +160,7 @@ def native_arch(platform: PlatformName) -> "Architecture | None":
         return native_architecture
 
     @staticmethod
-    def auto_archs(platform: PlatformName) -> "set[Architecture]":
+    def auto_archs(platform: PlatformName) -> set[Architecture]:
         native_arch = Architecture.native_arch(platform)
         if native_arch is None:
             return set()  # can't build anything on this platform
@@ -171,7 +176,7 @@ def auto_archs(platform: PlatformName) -> "set[Architecture]":
         return result
 
     @staticmethod
-    def all_archs(platform: PlatformName) -> "set[Architecture]":
+    def all_archs(platform: PlatformName) -> set[Architecture]:
         all_archs_map = {
             "linux": {
                 Architecture.x86_64,
@@ -195,7 +200,7 @@ def all_archs(platform: PlatformName) -> "set[Architecture]":
         return all_archs_map[platform]
 
     @staticmethod
-    def bitness_archs(platform: PlatformName, bitness: Literal["64", "32"]) -> "set[Architecture]":
+    def bitness_archs(platform: PlatformName, bitness: Literal["64", "32"]) -> set[Architecture]:
         # This map maps 64-bit architectures to their 32-bit equivalents.
         archs_map = {
             Architecture.x86_64: Architecture.i686,
diff --git a/cibuildwheel/environment.py b/cibuildwheel/environment.py
index 57c3ea9ad..8df4d9dd7 100644
--- a/cibuildwheel/environment.py
+++ b/cibuildwheel/environment.py
@@ -1,14 +1,20 @@
-__lazy_modules__ = ["bashlex", "bashlex.errors", "collections", "collections.abc"]
+from __future__ import annotations
+
+__lazy_modules__ = ["bashlex", "bashlex.errors", "collections"]
 
 import dataclasses
-from collections.abc import Mapping, Sequence
-from typing import Any, Protocol
+from typing import Protocol
 
 import bashlex
 import bashlex.errors
 
 from cibuildwheel import bashlex_eval
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Mapping, Sequence
+    from typing import Any
+
 
 class EnvironmentParseError(Exception):
     pass
diff --git a/cibuildwheel/extra.py b/cibuildwheel/extra.py
index c4da2b4b4..478c56b73 100644
--- a/cibuildwheel/extra.py
+++ b/cibuildwheel/extra.py
@@ -2,9 +2,10 @@
 These are utilities for the `/bin` scripts, not for the `cibuildwheel` program.
 """
 
+from __future__ import annotations
+
 __lazy_modules__ = [
     "collections",
-    "collections.abc",
     "io",
     "json",
     "time",
@@ -18,14 +19,18 @@
 import typing
 import urllib.error
 import urllib.request
-from collections.abc import Mapping, Sequence
 from io import StringIO
-from typing import Any, NotRequired, Protocol
+from typing import NotRequired, Protocol
 
 from cibuildwheel import __version__ as cibw_version
 
 __all__ = ("Printable", "dump_python_configurations")
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Mapping, Sequence
+    from typing import Any
+
 
 class Printable(Protocol):
     def __str__(self) -> str: ...
diff --git a/cibuildwheel/frontend.py b/cibuildwheel/frontend.py
index 3ca7ea2cf..296ab7524 100644
--- a/cibuildwheel/frontend.py
+++ b/cibuildwheel/frontend.py
@@ -1,20 +1,24 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.logger",
     "cibuildwheel.util.helpers",
     "collections",
-    "collections.abc",
     "shlex",
 ]
 
 import dataclasses
 import shlex
 import typing
-from collections.abc import Sequence
 from typing import Literal, Self, get_args
 
 from cibuildwheel.logger import log
 from cibuildwheel.util.helpers import parse_key_value_string
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
 BuildFrontendName = Literal["pip", "build", "build[uv]", "uv"]
 
 
diff --git a/cibuildwheel/logger.py b/cibuildwheel/logger.py
index 4c2ef3925..e0fcb5fa5 100644
--- a/cibuildwheel/logger.py
+++ b/cibuildwheel/logger.py
@@ -1,8 +1,9 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.ci",
     "codecs",
     "collections",
-    "collections.abc",
     "contextlib",
     "functools",
     "hashlib",
@@ -27,15 +28,18 @@
 import sys
 import textwrap
 import time
-from collections.abc import Generator
 from pathlib import Path
-from typing import IO, TYPE_CHECKING, AnyStr, Final, Literal
+from typing import Final
 
 import humanize
 
 from cibuildwheel.ci import CIProvider, detect_ci_provider, filter_ansi_codes
 
+TYPE_CHECKING = False
 if TYPE_CHECKING:
+    from collections.abc import Generator
+    from typing import IO, AnyStr, Literal
+
     from cibuildwheel.options import Options
 
 FoldPattern = tuple[str, str]
@@ -252,7 +256,7 @@ def error(self, error: BaseException | str) -> None:
             print(f"cibuildwheel: {c.bright_red}error{c.end}: {error}\n", file=sys.stderr)
 
     @contextlib.contextmanager
-    def print_summary(self, *, options: "Options") -> Generator[None, None, None]:
+    def print_summary(self, *, options: Options) -> Generator[None, None, None]:
         start = time.time()
         yield
         duration = time.time() - start
@@ -310,7 +314,7 @@ def _fold_group_identifier(name: str) -> str:
         # lowercase, shorten
         return identifier.lower()[:20]
 
-    def _github_step_summary(self, duration: float, options: "Options") -> str:
+    def _github_step_summary(self, duration: float, options: Options) -> str:
         """
         Returns the GitHub step summary, in markdown format.
         """
diff --git a/cibuildwheel/oci_container.py b/cibuildwheel/oci_container.py
index a43048ce0..8c60e55c2 100644
--- a/cibuildwheel/oci_container.py
+++ b/cibuildwheel/oci_container.py
@@ -1,12 +1,12 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.ci",
     "cibuildwheel.errors",
     "cibuildwheel.logger",
-    "cibuildwheel.typing",
     "cibuildwheel.util.cmd",
     "cibuildwheel.util.helpers",
     "collections",
-    "collections.abc",
     "io",
     "json",
     "os",
@@ -17,7 +17,6 @@
     "subprocess",
     "sys",
     "textwrap",
-    "types",
     "uuid",
 ]
 
@@ -33,19 +32,24 @@
 import textwrap
 import typing
 import uuid
-from collections.abc import Mapping, Sequence
 from enum import Enum
 from pathlib import Path, PurePath, PurePosixPath
-from types import TracebackType
-from typing import IO, Literal, Self, assert_never
+from typing import Literal, assert_never
 
 from cibuildwheel.ci import CIProvider, detect_ci_provider
 from cibuildwheel.errors import OCIEngineTooOldError
 from cibuildwheel.logger import log
-from cibuildwheel.typing import PathOrStr
 from cibuildwheel.util.cmd import call
 from cibuildwheel.util.helpers import FlexibleVersion, parse_key_value_string, strtobool
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Mapping, Sequence
+    from types import TracebackType
+    from typing import IO, Self
+
+    from cibuildwheel.typing import PathOrStr
+
 ContainerEngineName = Literal["docker", "podman"]
 
 
@@ -60,7 +64,7 @@ class OCIPlatform(Enum):
     S390X = "linux/s390x"
 
     @classmethod
-    def native(cls) -> "OCIPlatform":
+    def native(cls) -> OCIPlatform:
         """Return the current OCI platform, or raise ValueError if unknown."""
         arch = platform.machine().lower()
         mapping = {
diff --git a/cibuildwheel/options.py b/cibuildwheel/options.py
index ef46d9008..5ec9299b8 100644
--- a/cibuildwheel/options.py
+++ b/cibuildwheel/options.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.architecture",
     "cibuildwheel.environment",
@@ -35,7 +37,7 @@
 import tomllib
 from collections.abc import Callable, Generator, Iterable, Mapping, Sequence, Set
 from pathlib import Path
-from typing import Any, Final, Literal, Self, assert_never
+from typing import Final, assert_never
 
 from packaging.specifiers import SpecifierSet
 
@@ -52,6 +54,10 @@
 from cibuildwheel.util.helpers import format_safe, parse_key_value_string, strtobool, unwrap
 from cibuildwheel.util.packaging import DependencyConstraints
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import Any, Literal, Self
+
 MANYLINUX_ARCHS: Final[tuple[str, ...]] = (
     "x86_64",
     "i686",
diff --git a/cibuildwheel/platforms/__init__.py b/cibuildwheel/platforms/__init__.py
index 5236256b9..4e577ba0a 100644
--- a/cibuildwheel/platforms/__init__.py
+++ b/cibuildwheel/platforms/__init__.py
@@ -3,11 +3,12 @@
 __lazy_modules__ = ["sys"]
 
 import sys
-from typing import TYPE_CHECKING, Final, Protocol
+from typing import Final, Protocol
 
 from cibuildwheel import errors
 from cibuildwheel.platforms import android, ios, linux, macos, pyodide, windows
 
+TYPE_CHECKING = False
 if TYPE_CHECKING:
     from collections.abc import Sequence
     from pathlib import Path
diff --git a/cibuildwheel/platforms/android.py b/cibuildwheel/platforms/android.py
index e37e6c19a..264571e7e 100644
--- a/cibuildwheel/platforms/android.py
+++ b/cibuildwheel/platforms/android.py
@@ -1,11 +1,11 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "build",
     "build.env",
     "cibuildwheel.architecture",
     "cibuildwheel.frontend",
     "cibuildwheel.logger",
-    "cibuildwheel.options",
-    "cibuildwheel.selector",
     "cibuildwheel.util",
     "cibuildwheel.util.cmd",
     "cibuildwheel.util.file",
@@ -14,7 +14,6 @@
     "cibuildwheel.util.python_build_standalone",
     "cibuildwheel.venv",
     "collections",
-    "collections.abc",
     "csv",
     "elftools",
     "elftools.common.exceptions",
@@ -33,7 +32,6 @@
     "subprocess",
     "sysconfig",
     "textwrap",
-    "typing",
 ]
 
 import csv
@@ -45,14 +43,12 @@
 import shutil
 import subprocess
 import sysconfig
-from collections.abc import Iterable, Iterator, MutableMapping
 from dataclasses import dataclass
 from os.path import relpath
 from pathlib import Path
 from pprint import pprint
 from runpy import run_path
 from textwrap import dedent
-from typing import Any
 
 from build import ProjectBuilder
 from build.env import IsolatedEnv
@@ -64,8 +60,6 @@
 from cibuildwheel.architecture import Architecture, arch_synonym
 from cibuildwheel.frontend import get_build_frontend_extra_flags, parse_config_settings
 from cibuildwheel.logger import log
-from cibuildwheel.options import BuildOptions, Options
-from cibuildwheel.selector import BuildSelector
 from cibuildwheel.util import resources
 from cibuildwheel.util.cmd import call, shell
 from cibuildwheel.util.file import CIBW_CACHE_PATH, copy_test_sources, download, move_file
@@ -74,6 +68,14 @@
 from cibuildwheel.util.python_build_standalone import create_python_build_standalone_environment
 from cibuildwheel.venv import constraint_flags, find_uv, virtualenv
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Iterable, Iterator, MutableMapping
+    from typing import Any
+
+    from cibuildwheel.options import BuildOptions, Options
+    from cibuildwheel.selector import BuildSelector
+
 ANDROID_TRIPLET = {
     "arm64_v8a": "aarch64-linux-android",
     "x86_64": "x86_64-linux-android",
diff --git a/cibuildwheel/platforms/ios.py b/cibuildwheel/platforms/ios.py
index 5a2a3cc3e..a52449f6c 100644
--- a/cibuildwheel/platforms/ios.py
+++ b/cibuildwheel/platforms/ios.py
@@ -30,7 +30,7 @@
 import sys
 import textwrap
 from pathlib import Path
-from typing import TYPE_CHECKING, assert_never
+from typing import assert_never
 
 from filelock import FileLock
 
@@ -45,6 +45,7 @@
 from cibuildwheel.util.packaging import find_compatible_wheel
 from cibuildwheel.venv import constraint_flags, virtualenv
 
+TYPE_CHECKING = False
 if TYPE_CHECKING:
     from collections.abc import Sequence, Set
 
diff --git a/cibuildwheel/platforms/linux.py b/cibuildwheel/platforms/linux.py
index 8ffcdce51..7e3ff815d 100644
--- a/cibuildwheel/platforms/linux.py
+++ b/cibuildwheel/platforms/linux.py
@@ -1,14 +1,13 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.frontend",
     "cibuildwheel.logger",
-    "cibuildwheel.options",
-    "cibuildwheel.selector",
     "cibuildwheel.util",
     "cibuildwheel.util.file",
     "cibuildwheel.util.helpers",
     "cibuildwheel.util.packaging",
     "collections",
-    "collections.abc",
     "contextlib",
     "pathlib",
     "subprocess",
@@ -22,23 +21,25 @@
 import sys
 import textwrap
 from collections import OrderedDict
-from collections.abc import Iterable, Iterator, Sequence, Set
 from pathlib import Path, PurePath, PurePosixPath
-from typing import TYPE_CHECKING, assert_never
+from typing import assert_never
 
 from cibuildwheel import errors
 from cibuildwheel.architecture import Architecture
 from cibuildwheel.frontend import get_build_frontend_extra_flags
 from cibuildwheel.logger import log
 from cibuildwheel.oci_container import OCIContainer, OCIContainerEngineConfig, OCIPlatform
-from cibuildwheel.options import BuildOptions, Options
-from cibuildwheel.selector import BuildSelector
 from cibuildwheel.util import resources
 from cibuildwheel.util.file import copy_test_sources
 from cibuildwheel.util.helpers import prepare_command, unwrap
 from cibuildwheel.util.packaging import find_compatible_wheel
 
+TYPE_CHECKING = False
 if TYPE_CHECKING:
+    from collections.abc import Iterable, Iterator, Sequence, Set
+
+    from cibuildwheel.options import BuildOptions, Options
+    from cibuildwheel.selector import BuildSelector
     from cibuildwheel.typing import PathOrStr
 
 ARCHITECTURE_OCI_PLATFORM_MAP = {
diff --git a/cibuildwheel/platforms/macos.py b/cibuildwheel/platforms/macos.py
index d0a45b88d..655ea4f41 100644
--- a/cibuildwheel/platforms/macos.py
+++ b/cibuildwheel/platforms/macos.py
@@ -1,11 +1,9 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
-    "cibuildwheel.architecture",
     "cibuildwheel.ci",
-    "cibuildwheel.environment",
     "cibuildwheel.frontend",
     "cibuildwheel.logger",
-    "cibuildwheel.options",
-    "cibuildwheel.selector",
     "cibuildwheel.util",
     "cibuildwheel.util.cmd",
     "cibuildwheel.util.file",
@@ -13,7 +11,6 @@
     "cibuildwheel.util.packaging",
     "cibuildwheel.venv",
     "collections",
-    "collections.abc",
     "filelock",
     "inspect",
     "os",
@@ -38,21 +35,16 @@
 import subprocess
 import sys
 import typing
-from collections.abc import Set
 from pathlib import Path
-from typing import Literal, assert_never
+from typing import assert_never
 
 from filelock import FileLock
 from packaging.version import Version
 
 from cibuildwheel import errors
-from cibuildwheel.architecture import Architecture
 from cibuildwheel.ci import detect_ci_provider
-from cibuildwheel.environment import ParsedEnvironment
 from cibuildwheel.frontend import BuildFrontendName, get_build_frontend_extra_flags
 from cibuildwheel.logger import log
-from cibuildwheel.options import Options
-from cibuildwheel.selector import BuildSelector
 from cibuildwheel.util import resources
 from cibuildwheel.util.cmd import call, shell
 from cibuildwheel.util.file import CIBW_CACHE_PATH, copy_test_sources, download, move_file
@@ -60,6 +52,16 @@
 from cibuildwheel.util.packaging import find_compatible_wheel, get_pip_version
 from cibuildwheel.venv import constraint_flags, find_uv, virtualenv
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Set
+    from typing import Literal
+
+    from cibuildwheel.architecture import Architecture
+    from cibuildwheel.environment import ParsedEnvironment
+    from cibuildwheel.options import Options
+    from cibuildwheel.selector import BuildSelector
+
 
 @functools.cache
 def get_macos_version() -> tuple[int, int]:
diff --git a/cibuildwheel/platforms/pyodide.py b/cibuildwheel/platforms/pyodide.py
index 031b3af48..728a4848d 100644
--- a/cibuildwheel/platforms/pyodide.py
+++ b/cibuildwheel/platforms/pyodide.py
@@ -1,10 +1,9 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.architecture",
-    "cibuildwheel.environment",
     "cibuildwheel.frontend",
     "cibuildwheel.logger",
-    "cibuildwheel.options",
-    "cibuildwheel.selector",
     "cibuildwheel.util",
     "cibuildwheel.util.cmd",
     "cibuildwheel.util.file",
@@ -13,7 +12,6 @@
     "cibuildwheel.util.python_build_standalone",
     "cibuildwheel.venv",
     "collections",
-    "collections.abc",
     "filelock",
     "json",
     "os",
@@ -33,7 +31,6 @@
 import sys
 import tomllib
 import typing
-from collections.abc import Set
 from pathlib import Path
 from tempfile import TemporaryDirectory
 from typing import Final, TypedDict
@@ -42,11 +39,8 @@
 
 from cibuildwheel import errors
 from cibuildwheel.architecture import Architecture
-from cibuildwheel.environment import ParsedEnvironment
 from cibuildwheel.frontend import get_build_frontend_extra_flags
 from cibuildwheel.logger import log
-from cibuildwheel.options import Options
-from cibuildwheel.selector import BuildSelector
 from cibuildwheel.util import resources
 from cibuildwheel.util.cmd import call, shell
 from cibuildwheel.util.file import (
@@ -65,6 +59,14 @@
 )
 from cibuildwheel.venv import constraint_flags, virtualenv
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Set
+
+    from cibuildwheel.environment import ParsedEnvironment
+    from cibuildwheel.options import Options
+    from cibuildwheel.selector import BuildSelector
+
 IS_WIN: Final[bool] = sys.platform.startswith("win")
 
 
diff --git a/cibuildwheel/platforms/windows.py b/cibuildwheel/platforms/windows.py
index f07e2926e..4127d1fe3 100644
--- a/cibuildwheel/platforms/windows.py
+++ b/cibuildwheel/platforms/windows.py
@@ -1,10 +1,9 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.architecture",
-    "cibuildwheel.environment",
     "cibuildwheel.frontend",
     "cibuildwheel.logger",
-    "cibuildwheel.options",
-    "cibuildwheel.selector",
     "cibuildwheel.util",
     "cibuildwheel.util.cmd",
     "cibuildwheel.util.file",
@@ -12,7 +11,6 @@
     "cibuildwheel.util.packaging",
     "cibuildwheel.venv",
     "collections",
-    "collections.abc",
     "filelock",
     "json",
     "os",
@@ -31,7 +29,6 @@
 import shutil
 import subprocess
 import textwrap
-from collections.abc import MutableMapping, Sequence, Set
 from functools import cache
 from pathlib import Path
 from typing import assert_never
@@ -40,11 +37,8 @@
 
 from cibuildwheel import errors
 from cibuildwheel.architecture import Architecture
-from cibuildwheel.environment import ParsedEnvironment
-from cibuildwheel.frontend import BuildFrontendName, get_build_frontend_extra_flags
+from cibuildwheel.frontend import get_build_frontend_extra_flags
 from cibuildwheel.logger import log
-from cibuildwheel.options import Options
-from cibuildwheel.selector import BuildSelector
 from cibuildwheel.util import resources
 from cibuildwheel.util.cmd import call, shell
 from cibuildwheel.util.file import (
@@ -58,6 +52,15 @@
 from cibuildwheel.util.packaging import find_compatible_wheel, get_pip_version
 from cibuildwheel.venv import constraint_flags, find_uv, virtualenv
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import MutableMapping, Sequence, Set
+
+    from cibuildwheel.environment import ParsedEnvironment
+    from cibuildwheel.frontend import BuildFrontendName
+    from cibuildwheel.options import Options
+    from cibuildwheel.selector import BuildSelector
+
 
 def get_nuget_args(
     version: str, arch: str, free_threaded: bool, output_directory: Path
diff --git a/cibuildwheel/projectfiles.py b/cibuildwheel/projectfiles.py
index f5500d3ef..3366c038d 100644
--- a/cibuildwheel/projectfiles.py
+++ b/cibuildwheel/projectfiles.py
@@ -1,13 +1,18 @@
-__lazy_modules__ = ["configparser", "contextlib", "dependency_groups", "pathlib", "typing"]
+from __future__ import annotations
+
+__lazy_modules__ = ["configparser", "contextlib", "dependency_groups"]
 
 import ast
 import configparser
 import contextlib
-from pathlib import Path
-from typing import Any
 
 import dependency_groups
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from pathlib import Path
+    from typing import Any
+
 
 def get_parent(node: ast.AST | None, depth: int = 1) -> ast.AST | None:
     for _ in range(depth):
diff --git a/cibuildwheel/resources/_cross_venv.py b/cibuildwheel/resources/_cross_venv.py
index 3c14da1e2..52bf0163e 100644
--- a/cibuildwheel/resources/_cross_venv.py
+++ b/cibuildwheel/resources/_cross_venv.py
@@ -1,7 +1,9 @@
+from __future__ import annotations
+
 # This module is copied into the site-packages directory of an Android build environment, and
 # activated via a .pth file when we want the environment to simulate Android.
 
-__lazy_modules__ = ["os", "pathlib", "platform", "re", "sys", "sysconfig", "typing"]
+__lazy_modules__ = ["os", "pathlib", "platform", "re", "sys", "sysconfig"]
 
 import os
 import platform
@@ -9,7 +11,10 @@
 import sys
 import sysconfig
 from pathlib import Path
-from typing import Any
+
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import Any
 
 
 def initialize() -> None:
diff --git a/cibuildwheel/resources/testing_temp_dir_file.py b/cibuildwheel/resources/testing_temp_dir_file.py
index 782c60139..6ff39bd3f 100644
--- a/cibuildwheel/resources/testing_temp_dir_file.py
+++ b/cibuildwheel/resources/testing_temp_dir_file.py
@@ -1,11 +1,16 @@
+from __future__ import annotations
+
 # this file is copied to the testing cwd, to raise the below error message if
 # pytest/unittest is run from there.
 
-__lazy_modules__ = ["sys", "typing"]
+__lazy_modules__ = ["sys"]
 
 import sys
 import unittest
-from typing import NoReturn
+
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import NoReturn
 
 
 class TestStringMethods(unittest.TestCase):
diff --git a/cibuildwheel/schema.py b/cibuildwheel/schema.py
index 5770787e6..6f95c32de 100644
--- a/cibuildwheel/schema.py
+++ b/cibuildwheel/schema.py
@@ -1,10 +1,15 @@
-__lazy_modules__ = ["cibuildwheel.util", "json", "typing"]
+from __future__ import annotations
+
+__lazy_modules__ = ["cibuildwheel.util", "json"]
 
 import json
-from typing import Any
 
 from cibuildwheel.util import resources
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import Any
+
 
 def get_schema(tool_name: str = "cibuildwheel") -> dict[str, Any]:
     "Get the stored complete schema for cibuildwheel settings."
diff --git a/cibuildwheel/selector.py b/cibuildwheel/selector.py
index 30deedd07..15aea26b2 100644
--- a/cibuildwheel/selector.py
+++ b/cibuildwheel/selector.py
@@ -1,23 +1,27 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "bracex",
     "fnmatch",
     "itertools",
     "packaging",
-    "packaging.specifiers",
     "packaging.version",
-    "typing",
 ]
 
 import dataclasses
 import itertools
 from enum import StrEnum
 from fnmatch import fnmatch
-from typing import Any
 
 import bracex
-from packaging.specifiers import SpecifierSet
 from packaging.version import Version
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from typing import Any
+
+    from packaging.specifiers import SpecifierSet
+
 
 def selector_matches(patterns: str, string: str) -> bool:
     """
@@ -47,11 +51,11 @@ class EnableGroup(StrEnum):
     PyodidePrerelease = "pyodide-prerelease"
 
     @classmethod
-    def all_groups(cls) -> frozenset["EnableGroup"]:
+    def all_groups(cls) -> frozenset[EnableGroup]:
         return frozenset(cls)
 
     @classmethod
-    def parse_option_value(cls, value: str) -> frozenset["EnableGroup"]:
+    def parse_option_value(cls, value: str) -> frozenset[EnableGroup]:
         """
         Parses a string of space-separated values into a set of EnableGroup
         members. The string may contain group names or "all".
diff --git a/cibuildwheel/util/cmd.py b/cibuildwheel/util/cmd.py
index 8da2c5b42..ba847251d 100644
--- a/cibuildwheel/util/cmd.py
+++ b/cibuildwheel/util/cmd.py
@@ -1,8 +1,8 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.errors",
-    "cibuildwheel.typing",
     "collections",
-    "collections.abc",
     "os",
     "shlex",
     "shutil",
@@ -15,11 +15,16 @@
 import subprocess
 import sys
 import typing
-from collections.abc import Iterator, Mapping
-from typing import Final, Literal
+from typing import Final
 
 from cibuildwheel.errors import FatalError
-from cibuildwheel.typing import PathOrStr
+
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Iterator, Mapping
+    from typing import Literal
+
+    from cibuildwheel.typing import PathOrStr
 
 _IS_WIN: Final[bool] = sys.platform.startswith("win")
 
diff --git a/cibuildwheel/util/file.py b/cibuildwheel/util/file.py
index 1c6742ab0..c967ffae8 100644
--- a/cibuildwheel/util/file.py
+++ b/cibuildwheel/util/file.py
@@ -1,8 +1,9 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "certifi",
     "cibuildwheel.errors",
     "collections",
-    "collections.abc",
     "shutil",
     "ssl",
     "tarfile",
@@ -19,7 +20,6 @@
 import tarfile
 import time
 import urllib.request
-from collections.abc import Callable
 from pathlib import Path, PurePath
 from typing import Final
 from zipfile import ZipFile
@@ -29,6 +29,10 @@
 
 from cibuildwheel.errors import FatalError
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Callable
+
 DEFAULT_CIBW_CACHE_PATH: Final[Path] = user_cache_path(appname="cibuildwheel", appauthor="pypa")
 CIBW_CACHE_PATH: Final[Path] = Path(
     os.environ.get("CIBW_CACHE_PATH", DEFAULT_CIBW_CACHE_PATH)
diff --git a/cibuildwheel/util/helpers.py b/cibuildwheel/util/helpers.py
index 999ae4581..635a838b5 100644
--- a/cibuildwheel/util/helpers.py
+++ b/cibuildwheel/util/helpers.py
@@ -1,9 +1,8 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
-    "cibuildwheel.typing",
     "collections",
-    "collections.abc",
     "itertools",
-    "os",
     "re",
     "shlex",
     "textwrap",
@@ -11,14 +10,17 @@
 
 import dataclasses
 import itertools
-import os
 import re
 import shlex
 import textwrap
 from collections import defaultdict
-from collections.abc import Sequence
 
-from cibuildwheel.typing import PathOrStr
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    import os
+    from collections.abc import Sequence
+
+    from cibuildwheel.typing import PathOrStr
 
 
 def format_safe(template: str, **kwargs: str | os.PathLike[str]) -> str:
diff --git a/cibuildwheel/util/packaging.py b/cibuildwheel/util/packaging.py
index 31f618ba6..28b0f7288 100644
--- a/cibuildwheel/util/packaging.py
+++ b/cibuildwheel/util/packaging.py
@@ -1,18 +1,18 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.util.cmd",
     "cibuildwheel.util.helpers",
     "collections",
-    "collections.abc",
     "packaging",
     "packaging.utils",
     "shlex",
 ]
 
 import shlex
-from collections.abc import Mapping, Sequence
 from dataclasses import dataclass, field
 from pathlib import Path, PurePath
-from typing import Any, Literal, Self, TypeVar
+from typing import TypeVar
 
 from packaging.utils import parse_wheel_filename
 
@@ -20,6 +20,11 @@
 from cibuildwheel.util.cmd import call
 from cibuildwheel.util.helpers import parse_key_value_string, unwrap
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Mapping, Sequence
+    from typing import Any, Literal, Self
+
 
 @dataclass(kw_only=True)
 class DependencyConstraints:
diff --git a/cibuildwheel/util/python_build_standalone.py b/cibuildwheel/util/python_build_standalone.py
index 718208483..0c5c614d3 100644
--- a/cibuildwheel/util/python_build_standalone.py
+++ b/cibuildwheel/util/python_build_standalone.py
@@ -1,10 +1,11 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.util.file",
     "cibuildwheel.util.resources",
     "filelock",
     "fnmatch",
     "json",
-    "pathlib",
     "platform",
 ]
 
@@ -13,13 +14,16 @@
 import json
 import platform
 import typing
-from pathlib import Path
 
 from filelock import FileLock
 
 from cibuildwheel.util.file import download, extract_tar
 from cibuildwheel.util.resources import PYTHON_BUILD_STANDALONE_RELEASES
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from pathlib import Path
+
 
 class PythonBuildStandaloneAsset(typing.TypedDict):
     name: str
diff --git a/cibuildwheel/util/resources.py b/cibuildwheel/util/resources.py
index 6ef0d844a..f2ea85439 100644
--- a/cibuildwheel/util/resources.py
+++ b/cibuildwheel/util/resources.py
@@ -1,11 +1,15 @@
-__lazy_modules__ = ["cibuildwheel.typing", "tomllib", "typing"]
+from __future__ import annotations
+
+__lazy_modules__ = ["tomllib", "typing"]
 
 import functools
 import tomllib
 from pathlib import Path
 from typing import Final
 
-from cibuildwheel.typing import PlatformName
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from cibuildwheel.typing import PlatformName
 
 PATH: Final[Path] = Path(__file__).parent.parent / "resources"
 INSTALL_CERTIFI_SCRIPT: Final[Path] = PATH / "install_certifi.py"
diff --git a/cibuildwheel/venv.py b/cibuildwheel/venv.py
index 55db599d5..653246b09 100644
--- a/cibuildwheel/venv.py
+++ b/cibuildwheel/venv.py
@@ -1,9 +1,10 @@
+from __future__ import annotations
+
 __lazy_modules__ = [
     "cibuildwheel.util",
     "cibuildwheel.util.cmd",
     "cibuildwheel.util.file",
     "collections",
-    "collections.abc",
     "contextlib",
     "filelock",
     "os",
@@ -22,7 +23,6 @@
 import shutil
 import sys
 import tomllib
-from collections.abc import Sequence
 from pathlib import Path
 from typing import Final
 
@@ -34,6 +34,10 @@
 from cibuildwheel.util.cmd import call
 from cibuildwheel.util.file import CIBW_CACHE_PATH, download
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+
 _IS_WIN: Final[bool] = sys.platform.startswith("win")
 
 
diff --git a/unit_test/get_platform_test.py b/unit_test/get_platform_test.py
index e0c3e42df..dc36efc8b 100644
--- a/unit_test/get_platform_test.py
+++ b/unit_test/get_platform_test.py
@@ -2,7 +2,6 @@
 import sys
 from collections.abc import Generator
 from pathlib import Path
-from typing import TYPE_CHECKING
 
 import pytest
 import setuptools._distutils.util
@@ -11,6 +10,8 @@
 from cibuildwheel.errors import FatalError
 from cibuildwheel.platforms.windows import PythonConfiguration, setup_setuptools_cross_compile
 
+TYPE_CHECKING = False
+
 # monkeypatching os.name is too flaky. E.g. It works on my machine, but fails in pipeline
 if not sys.platform.startswith("win") and not TYPE_CHECKING:
     pytest.skip("Windows-only tests", allow_module_level=True)
diff --git a/unit_test/options_test.py b/unit_test/options_test.py
index 160825000..dd3595923 100644
--- a/unit_test/options_test.py
+++ b/unit_test/options_test.py
@@ -1,10 +1,10 @@
+from __future__ import annotations
+
 import os
 import platform as platform_module
 import textwrap
 import unittest.mock
-from collections.abc import Sequence
 from pathlib import Path
-from typing import Literal
 
 import pytest
 
@@ -22,6 +22,11 @@
 from cibuildwheel.util import resources
 from cibuildwheel.util.packaging import DependencyConstraints
 
+TYPE_CHECKING = False
+if TYPE_CHECKING:
+    from collections.abc import Sequence
+    from typing import Literal
+
 PYPROJECT_1 = """
 [tool.cibuildwheel]
 build = ["cp38-*", "cp313-*"]
diff --git a/unit_test/options_toml_test.py b/unit_test/options_toml_test.py
index 0fb19f638..1f2bb01bd 100644
--- a/unit_test/options_toml_test.py
+++ b/unit_test/options_toml_test.py
@@ -1,5 +1,4 @@
 import shlex
-from typing import TYPE_CHECKING
 
 import pytest
 
@@ -13,6 +12,7 @@
     _resolve_cascade,
 )
 
+TYPE_CHECKING = False
 if TYPE_CHECKING:
     from pathlib import Path