From dcc5c00a3db79d0db7ecc78d38306ea8e6ff5c01 Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@microsoft.com>
Date: Wed, 24 Aug 2022 00:32:20 +0100
Subject: [PATCH] Ensure cfg is removed, and add a message

---
 cibuildwheel/windows.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cibuildwheel/windows.py b/cibuildwheel/windows.py
index 31207efb..5c2d1f0a 100644
--- a/cibuildwheel/windows.py
+++ b/cibuildwheel/windows.py
@@ -174,6 +174,8 @@ def setup_setuptools_cross_compile(
             f"Unable to configure setuptools for cross-compiling because {distutils_cfg} is a directory"
         )
         return
+    else:
+        atexit.register(lambda: distutils_cfg.unlink)
 
     # Ensure our additional import libraries are made available, and explicitly
     # set the platform name
@@ -183,6 +185,8 @@ def setup_setuptools_cross_compile(
     distutils_cfg.write_text(
         textwrap.dedent(
             f"""\
+            # I am a temporary configuration file generated by cibuildwheel.
+            # Please remove me or I will likely break your other builds.
             [build]
             plat_name={plat_name}
             [build_ext]