diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 164bfac1..b3198cb3 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -77,6 +77,14 @@ repos:
     files: '^(README\.md|docs/changelog\.md|docs/options\.md|bin/readme.*)$'
     additional_dependencies: [cogapp>=3.5]
 
+- repo: https://github.com/henryiii/flake8-lazy
+  rev: 65b94e97b1091634368592d98072160842265fe4  # frozen: v0.8.2
+  hooks:
+  - id: flake8-lazy
+    args: ["--apply=set"]
+    files: '^cibuildwheel'
+    exclude: "^cibuildwheel/resources/"
+
 - repo: https://github.com/codespell-project/codespell
   rev: 2ccb47ff45ad361a21071a7eedda4c37e6ae8c5a  # frozen: v2.4.2
   hooks:
diff --git a/cibuildwheel/__main__.py b/cibuildwheel/__main__.py
index 2a3287ef..c5d5d772 100644
--- a/cibuildwheel/__main__.py
+++ b/cibuildwheel/__main__.py
@@ -1,5 +1,30 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "argparse",
+    "cibuildwheel._compat",
+    "cibuildwheel._compat.tarfile",
+    "cibuildwheel.architecture",
+    "cibuildwheel.ci",
+    "cibuildwheel.logger",
+    "cibuildwheel.options",
+    "cibuildwheel.platforms",
+    "cibuildwheel.selector",
+    "cibuildwheel.typing",
+    "cibuildwheel.util",
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.resources",
+    "contextlib",
+    "functools",
+    "io",
+    "pathlib",
+    "shutil",
+    "tempfile",
+    "textwrap",
+    "traceback",
+}
+
 import argparse
 import contextlib
 import dataclasses
diff --git a/cibuildwheel/architecture.py b/cibuildwheel/architecture.py
index 41d5ad86..4fe43741 100644
--- a/cibuildwheel/architecture.py
+++ b/cibuildwheel/architecture.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"platform", "re", "shutil", "subprocess"}
+
 import platform as platform_module
 import re
 import shutil
diff --git a/cibuildwheel/audit.py b/cibuildwheel/audit.py
index 10f4c7cf..dadaef04 100644
--- a/cibuildwheel/audit.py
+++ b/cibuildwheel/audit.py
@@ -1,5 +1,16 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.logger",
+    "cibuildwheel.util",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "cibuildwheel.venv",
+    "pathlib",
+    "subprocess",
+}
+
 import subprocess
 import sys
 from pathlib import Path
diff --git a/cibuildwheel/bashlex_eval.py b/cibuildwheel/bashlex_eval.py
index 85cdcb1a..5a327a66 100644
--- a/cibuildwheel/bashlex_eval.py
+++ b/cibuildwheel/bashlex_eval.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"bashlex", "subprocess"}
+
 import dataclasses
 import subprocess
 
diff --git a/cibuildwheel/ci.py b/cibuildwheel/ci.py
index 648f29c2..09619f12 100644
--- a/cibuildwheel/ci.py
+++ b/cibuildwheel/ci.py
@@ -1,3 +1,5 @@
+__lazy_modules__ = {"cibuildwheel.util", "cibuildwheel.util.helpers"}
+
 import os
 import re
 from enum import Enum
diff --git a/cibuildwheel/environment.py b/cibuildwheel/environment.py
index bc5d13bf..a38ad22a 100644
--- a/cibuildwheel/environment.py
+++ b/cibuildwheel/environment.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"bashlex", "bashlex.errors"}
+
 import dataclasses
 from typing import Protocol
 
diff --git a/cibuildwheel/errors.py b/cibuildwheel/errors.py
index 2a6ae594..6576fb90 100644
--- a/cibuildwheel/errors.py
+++ b/cibuildwheel/errors.py
@@ -4,6 +4,8 @@ a different return code, by defining them all here, we can ensure that they're
 semantically clear and unique.
 """
 
+__lazy_modules__ = {"textwrap"}
+
 import textwrap
 
 
diff --git a/cibuildwheel/extra.py b/cibuildwheel/extra.py
index 30f280cb..9b1abcb1 100644
--- a/cibuildwheel/extra.py
+++ b/cibuildwheel/extra.py
@@ -4,6 +4,8 @@ These are utilities for the `/bin` scripts, not for the `cibuildwheel` program.
 
 from __future__ import annotations
 
+__lazy_modules__ = {"io", "json", "urllib", "urllib.error", "urllib.request"}
+
 import json
 import time
 import typing
diff --git a/cibuildwheel/frontend.py b/cibuildwheel/frontend.py
index 14a8ede8..41c53b34 100644
--- a/cibuildwheel/frontend.py
+++ b/cibuildwheel/frontend.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"cibuildwheel.util", "cibuildwheel.util.helpers", "shlex"}
+
 import dataclasses
 import shlex
 import typing
diff --git a/cibuildwheel/logger.py b/cibuildwheel/logger.py
index da33370e..69314fac 100644
--- a/cibuildwheel/logger.py
+++ b/cibuildwheel/logger.py
@@ -1,5 +1,17 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.ci",
+    "contextlib",
+    "functools",
+    "hashlib",
+    "humanize",
+    "io",
+    "pathlib",
+    "re",
+    "textwrap",
+}
+
 import codecs
 import contextlib
 import dataclasses
diff --git a/cibuildwheel/oci_container.py b/cibuildwheel/oci_container.py
index db9e1f03..49e14a93 100644
--- a/cibuildwheel/oci_container.py
+++ b/cibuildwheel/oci_container.py
@@ -1,5 +1,23 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.ci",
+    "cibuildwheel.errors",
+    "cibuildwheel.logger",
+    "cibuildwheel.util",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.helpers",
+    "contextlib",
+    "io",
+    "json",
+    "platform",
+    "shlex",
+    "shutil",
+    "subprocess",
+    "textwrap",
+    "uuid",
+}
+
 import contextlib
 import dataclasses
 import io
diff --git a/cibuildwheel/options.py b/cibuildwheel/options.py
index ed39bf35..2d3e32a3 100644
--- a/cibuildwheel/options.py
+++ b/cibuildwheel/options.py
@@ -1,5 +1,29 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.architecture",
+    "cibuildwheel.environment",
+    "cibuildwheel.frontend",
+    "cibuildwheel.logger",
+    "cibuildwheel.oci_container",
+    "cibuildwheel.projectfiles",
+    "cibuildwheel.selector",
+    "cibuildwheel.typing",
+    "cibuildwheel.util",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "collections",
+    "configparser",
+    "contextlib",
+    "difflib",
+    "packaging",
+    "packaging.specifiers",
+    "pathlib",
+    "shlex",
+    "textwrap",
+    "tomllib",
+}
+
 import collections
 import configparser
 import contextlib
diff --git a/cibuildwheel/platforms/android.py b/cibuildwheel/platforms/android.py
index d65de5ac..5e47196b 100644
--- a/cibuildwheel/platforms/android.py
+++ b/cibuildwheel/platforms/android.py
@@ -1,5 +1,33 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "build",
+    "build.env",
+    "cibuildwheel.architecture",
+    "cibuildwheel.audit",
+    "cibuildwheel.frontend",
+    "cibuildwheel.logger",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "cibuildwheel.util.python_build_standalone",
+    "cibuildwheel.venv",
+    "filelock",
+    "packaging",
+    "packaging.utils",
+    "pathlib",
+    "platform",
+    "pprint",
+    "re",
+    "runpy",
+    "shlex",
+    "shutil",
+    "subprocess",
+    "textwrap",
+    "typing",
+}
+
 import os
 import platform
 import re
diff --git a/cibuildwheel/platforms/ios.py b/cibuildwheel/platforms/ios.py
index 61e7574d..60ee0daa 100644
--- a/cibuildwheel/platforms/ios.py
+++ b/cibuildwheel/platforms/ios.py
@@ -1,5 +1,28 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.audit",
+    "cibuildwheel.frontend",
+    "cibuildwheel.logger",
+    "cibuildwheel.platforms.macos",
+    "cibuildwheel.util",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "cibuildwheel.venv",
+    "filelock",
+    "packaging",
+    "packaging.version",
+    "pathlib",
+    "platform",
+    "shlex",
+    "shutil",
+    "subprocess",
+    "textwrap",
+    "typing",
+}
+
 import dataclasses
 import os
 import platform
diff --git a/cibuildwheel/platforms/linux.py b/cibuildwheel/platforms/linux.py
index 606eacc4..54f29e4e 100644
--- a/cibuildwheel/platforms/linux.py
+++ b/cibuildwheel/platforms/linux.py
@@ -1,5 +1,22 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.audit",
+    "cibuildwheel.frontend",
+    "cibuildwheel.logger",
+    "cibuildwheel.util",
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "collections",
+    "contextlib",
+    "pathlib",
+    "shutil",
+    "subprocess",
+    "textwrap",
+    "typing",
+}
+
 import contextlib
 import dataclasses
 import shutil
diff --git a/cibuildwheel/platforms/macos.py b/cibuildwheel/platforms/macos.py
index 4a20012d..5ef4a3e7 100644
--- a/cibuildwheel/platforms/macos.py
+++ b/cibuildwheel/platforms/macos.py
@@ -1,5 +1,27 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.audit",
+    "cibuildwheel.ci",
+    "cibuildwheel.frontend",
+    "cibuildwheel.logger",
+    "cibuildwheel.util",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "cibuildwheel.venv",
+    "filelock",
+    "inspect",
+    "packaging",
+    "packaging.version",
+    "pathlib",
+    "platform",
+    "re",
+    "shutil",
+    "subprocess",
+}
+
 import dataclasses
 import functools
 import inspect
diff --git a/cibuildwheel/platforms/pyodide.py b/cibuildwheel/platforms/pyodide.py
index eb2bc032..444c55a4 100644
--- a/cibuildwheel/platforms/pyodide.py
+++ b/cibuildwheel/platforms/pyodide.py
@@ -1,5 +1,26 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.architecture",
+    "cibuildwheel.audit",
+    "cibuildwheel.frontend",
+    "cibuildwheel.logger",
+    "cibuildwheel.util",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "cibuildwheel.util.python_build_standalone",
+    "cibuildwheel.venv",
+    "filelock",
+    "json",
+    "pathlib",
+    "shutil",
+    "subprocess",
+    "tempfile",
+    "tomllib",
+}
+
 import dataclasses
 import functools
 import json
diff --git a/cibuildwheel/platforms/windows.py b/cibuildwheel/platforms/windows.py
index 6d1eaa4a..fd4aa65b 100644
--- a/cibuildwheel/platforms/windows.py
+++ b/cibuildwheel/platforms/windows.py
@@ -1,5 +1,25 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.architecture",
+    "cibuildwheel.audit",
+    "cibuildwheel.frontend",
+    "cibuildwheel.logger",
+    "cibuildwheel.util",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.helpers",
+    "cibuildwheel.util.packaging",
+    "cibuildwheel.venv",
+    "filelock",
+    "pathlib",
+    "platform",
+    "shutil",
+    "subprocess",
+    "textwrap",
+    "typing",
+}
+
 import dataclasses
 import os
 import platform as platform_module
diff --git a/cibuildwheel/projectfiles.py b/cibuildwheel/projectfiles.py
index 41af8b1f..ecc6a213 100644
--- a/cibuildwheel/projectfiles.py
+++ b/cibuildwheel/projectfiles.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"configparser", "contextlib", "dependency_groups"}
+
 import ast
 import configparser
 import contextlib
diff --git a/cibuildwheel/schema.py b/cibuildwheel/schema.py
index dde0efcc..b48793fd 100644
--- a/cibuildwheel/schema.py
+++ b/cibuildwheel/schema.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"cibuildwheel.util", "json"}
+
 import json
 
 from cibuildwheel.util import resources
diff --git a/cibuildwheel/selector.py b/cibuildwheel/selector.py
index 579a18f5..9314fa1e 100644
--- a/cibuildwheel/selector.py
+++ b/cibuildwheel/selector.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"bracex", "fnmatch", "itertools", "packaging", "packaging.version"}
+
 import dataclasses
 import itertools
 from enum import StrEnum
diff --git a/cibuildwheel/util/cmd.py b/cibuildwheel/util/cmd.py
index ed864c27..1795eb8e 100644
--- a/cibuildwheel/util/cmd.py
+++ b/cibuildwheel/util/cmd.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"cibuildwheel.errors", "shlex", "shutil", "subprocess"}
+
 import os
 import shlex
 import shutil
diff --git a/cibuildwheel/util/file.py b/cibuildwheel/util/file.py
index b92727ac..111b7d90 100644
--- a/cibuildwheel/util/file.py
+++ b/cibuildwheel/util/file.py
@@ -1,5 +1,19 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "certifi",
+    "cibuildwheel.errors",
+    "hashlib",
+    "shutil",
+    "ssl",
+    "tarfile",
+    "typing",
+    "urllib",
+    "urllib.request",
+    "zipfile",
+}
+
+
 import hashlib
 import os
 import shutil
diff --git a/cibuildwheel/util/helpers.py b/cibuildwheel/util/helpers.py
index a8a4df78..d6ed1797 100644
--- a/cibuildwheel/util/helpers.py
+++ b/cibuildwheel/util/helpers.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"collections", "itertools", "re", "shlex", "textwrap"}
+
 import dataclasses
 import itertools
 import re
diff --git a/cibuildwheel/util/packaging.py b/cibuildwheel/util/packaging.py
index d8bb57c6..58d2a281 100644
--- a/cibuildwheel/util/packaging.py
+++ b/cibuildwheel/util/packaging.py
@@ -1,5 +1,13 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.helpers",
+    "packaging",
+    "packaging.utils",
+    "shlex",
+}
+
 import shlex
 from dataclasses import dataclass, field
 from pathlib import Path, PurePath
diff --git a/cibuildwheel/util/python_build_standalone.py b/cibuildwheel/util/python_build_standalone.py
index 186569bb..2e8c7fb8 100644
--- a/cibuildwheel/util/python_build_standalone.py
+++ b/cibuildwheel/util/python_build_standalone.py
@@ -1,5 +1,16 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.util.file",
+    "cibuildwheel.util.resources",
+    "filelock",
+    "fnmatch",
+    "hashlib",
+    "json",
+    "platform",
+    "subprocess",
+}
+
 import fnmatch
 import functools
 import hashlib
diff --git a/cibuildwheel/util/resources.py b/cibuildwheel/util/resources.py
index dd3d151f..3bbef753 100644
--- a/cibuildwheel/util/resources.py
+++ b/cibuildwheel/util/resources.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+__lazy_modules__ = {"tomllib"}
+
 import functools
 import tomllib
 from pathlib import Path
diff --git a/cibuildwheel/venv.py b/cibuildwheel/venv.py
index 174b2a1b..2867edd7 100644
--- a/cibuildwheel/venv.py
+++ b/cibuildwheel/venv.py
@@ -1,5 +1,20 @@
 from __future__ import annotations
 
+__lazy_modules__ = {
+    "cibuildwheel.util",
+    "cibuildwheel.util.cmd",
+    "cibuildwheel.util.file",
+    "contextlib",
+    "filelock",
+    "packaging",
+    "packaging.markers",
+    "packaging.requirements",
+    "packaging.version",
+    "pathlib",
+    "shutil",
+    "tomllib",
+}
+
 import contextlib
 import functools
 import os