diff --git a/sdk_container/src/third_party/portage-stable/acct-user/portage/portage-0-r4.ebuild b/sdk_container/src/third_party/portage-stable/acct-user/portage/portage-0-r4.ebuild
new file mode 100644
index 0000000000..573bccbbad
--- /dev/null
+++ b/sdk_container/src/third_party/portage-stable/acct-user/portage/portage-0-r4.ebuild
@@ -0,0 +1,12 @@
+# Copyright 2020-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit acct-user
+
+ACCT_USER_ID=250
+ACCT_USER_HOME="/var/lib/portage/home"
+ACCT_USER_GROUPS=( portage jobserver )
+
+acct-user_add_deps