diff --git a/setup.cfg b/setup.cfg
index dbf815a56e9..b1a2172f8f1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,6 @@
+# Setuptools v62.3 doesn't support editable installs with just 'pyproject.toml' (PEP 660).
+# Keep this file until it does!
+
 [metadata]
 url = https://www.home-assistant.io/