diff --git a/sdk_container/src/third_party/portage-stable/eclass/out-of-source-utils.eclass b/sdk_container/src/third_party/portage-stable/eclass/out-of-source-utils.eclass
index b1b5fc05e3..7eb4740596 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/out-of-source-utils.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/out-of-source-utils.eclass
@@ -1,4 +1,4 @@
-# Copyright 2022-2024 Gentoo Authors
+# Copyright 2022-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: out-of-source-utils.eclass
@@ -6,7 +6,7 @@
 # Michał Górny <mgorny@gentoo.org>
 # @AUTHOR:
 # Michał Górny <mgorny@gentoo.org>
-# @SUPPORTED_EAPIS: 7 8
+# @SUPPORTED_EAPIS: 7 8 9
 # @BLURB: Utility functions for building packages out-of-source
 # @DESCRIPTION:
 # This eclass provides a run_in_build_dir() helper that can be used
@@ -16,7 +16,7 @@ if [[ -z ${_OUT_OF_SOURCE_UTILS_ECLASS} ]]; then
 _OUT_OF_SOURCE_UTILS_ECLASS=1
 
 case ${EAPI} in
-	7|8) ;;
+	7|8|9) ;;
 	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
 esac