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 548c6411fc..da13e7943a 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
@@ -1,11 +1,17 @@
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: preserve-libs.eclass
 # @MAINTAINER:
 # base-system@gentoo.org
+# @SUPPORTED_EAPIS: 5 6 7
 # @BLURB: preserve libraries after SONAME changes
 
+case ${EAPI:-0} in
+	[567]) ;;
+	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
+esac
+
 if [[ -z ${_PRESERVE_LIBS_ECLASS} ]]; then
 _PRESERVE_LIBS_ECLASS=1