diff --git a/sdk_container/src/third_party/portage-stable/eclass/preserve-libs.eclass b/sdk_container/src/third_party/portage-stable/eclass/preserve-libs.eclass
index da13e7943a..8866ff3ba0 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/preserve-libs.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/preserve-libs.eclass
@@ -1,14 +1,16 @@
 # Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
+# Flatcar: Support EAPI 0 and 4.
+
 # @ECLASS: preserve-libs.eclass
 # @MAINTAINER:
 # base-system@gentoo.org
-# @SUPPORTED_EAPIS: 5 6 7
+# @SUPPORTED_EAPIS: 0 4 5 6 7
 # @BLURB: preserve libraries after SONAME changes
 
 case ${EAPI:-0} in
-	[567]) ;;
+	[04567]) ;;
 	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
 esac