diff --git a/sdk_container/src/third_party/portage-stable/eclass/xdg-utils.eclass b/sdk_container/src/third_party/portage-stable/eclass/xdg-utils.eclass
index a834d5d3ac..7cde847536 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/xdg-utils.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/xdg-utils.eclass
@@ -1,13 +1,15 @@
 # Copyright 2004-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
+# Flatcar: Support EAPI 0 and 4.
+
 # @ECLASS: xdg-utils.eclass
 # @MAINTAINER:
 # gnome@gentoo.org
 # freedesktop-bugs@gentoo.org
 # @AUTHOR:
 # Original author: Gilles Dartiguelongue <eva@gentoo.org>
-# @SUPPORTED_EAPIS: 5 6 7 8
+# @SUPPORTED_EAPIS: 0 4 5 6 7 8
 # @BLURB: Auxiliary functions commonly used by XDG compliant packages.
 # @DESCRIPTION:
 # This eclass provides a set of auxiliary functions needed by most XDG
@@ -17,8 +19,8 @@
 #  * XDG .desktop files cache management
 #  * XDG mime information database management
 
-case ${EAPI} in
-	5|6|7|8) ;;
+case ${EAPI:-0} in
+	0|4|5|6|7|8) ;;
 	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
 esac