diff --git a/dev-python/dulwich/dulwich-0.22.4.ebuild b/dev-python/dulwich/dulwich-0.22.4.ebuild
index 367840375cc24..ed4304223767e 100644
--- a/dev-python/dulwich/dulwich-0.22.4.ebuild
+++ b/dev-python/dulwich/dulwich-0.22.4.ebuild
@@ -78,6 +78,7 @@ src_prepare() {
 
 	if use !native-extensions; then
 		# avoid hard dep on rust via setuptools_rust
+		# https://github.com/jelmer/dulwich/issues/1405
 		sed -i \
 			-e '/from setuptools_rust/d' \
 			-e '/^rust_extensions = \[/,/^\]/d' \