diff --git a/sdk_container/src/third_party/coreos-overlay/app-admin/sudo/sudo-1.9.17_p1.ebuild b/sdk_container/src/third_party/coreos-overlay/app-admin/sudo/sudo-1.9.17_p1.ebuild
index 71a60c624d..42d0796ff6 100644
--- a/sdk_container/src/third_party/coreos-overlay/app-admin/sudo/sudo-1.9.17_p1.ebuild
+++ b/sdk_container/src/third_party/coreos-overlay/app-admin/sudo/sudo-1.9.17_p1.ebuild
@@ -243,6 +243,11 @@ src_install() {
 	# Flatcar: Remove sudo.conf as it is shipped via baselayout
 	rm "${ED}/etc/sudo.conf" || die
 
+	# Flatcar: Build system installs /etc/sudoers.d, let's make
+	# sure we keep having it.
+	#
+	# Upstream PR: https://github.com/gentoo/gentoo/pull/37397
+	keepdir /etc/sudoers.d
 }
 
 pkg_postinst() {