diff --git a/sdk_container/src/third_party/portage-stable/eclass/lua-single.eclass b/sdk_container/src/third_party/portage-stable/eclass/lua-single.eclass
index 11c2790dac..2f4ebaa141 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/lua-single.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/lua-single.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: lua-single.eclass
@@ -8,7 +8,8 @@
 # @AUTHOR:
 # Marek Szuba <marecki@gentoo.org>
 # Based on python-single-r1.eclass by Michał Górny <mgorny@gentoo.org> et al.
-# @SUPPORTED_EAPIS: 7
+# @SUPPORTED_EAPIS: 7 8
+# @PROVIDES: lua-utils
 # @BLURB: An eclass for Lua packages not installed for multiple implementations.
 # @DESCRIPTION:
 # An extension of lua.eclass suite for packages which don't support being
@@ -34,9 +35,9 @@
 #
 # @EXAMPLE:
 # @CODE
-# EAPI=7
+# EAPI=8
 #
-# LUA_COMPAT=( lua5-{1..3} )
+# LUA_COMPAT=( lua5-{3..4} )
 #
 # inherit lua-single
 #
@@ -62,15 +63,10 @@
 # }
 # @CODE
 
-case ${EAPI:-0} in
-	0|1|2|3|4|5|6)
-		die "Unsupported EAPI=${EAPI} (too old) for ${ECLASS}"
-		;;
-	7)
-		;;
-	*)
-		die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
+case ${EAPI} in
+	7|8)
 		;;
+	*) die "${ECLASS}: EAPI ${EAPI:-0} not supported" ;;
 esac
 
 if [[ ! ${_LUA_SINGLE_R0} ]]; then
@@ -95,7 +91,7 @@ EXPORT_FUNCTIONS pkg_setup
 #
 # Example:
 # @CODE
-# LUA_COMPAT=( lua5-1 lua5-2 lua5-3 )
+# LUA_COMPAT=( lua5-1 lua5-3 lua5-4 )
 # @CODE
 #
 # Please note that you can also use bash brace expansion if you like:
@@ -120,7 +116,7 @@ EXPORT_FUNCTIONS pkg_setup
 #
 # Example:
 # @CODE
-# LUA_COMPAT_OVERRIDE='lua5-2' emerge -1v dev-lua/foo
+# LUA_COMPAT_OVERRIDE='luajit' emerge -1v dev-lua/foo
 # @CODE
 
 # @ECLASS-VARIABLE: LUA_REQ_USE
@@ -159,7 +155,7 @@ EXPORT_FUNCTIONS pkg_setup
 # Example value:
 # @CODE
 # lua_targets_lua5-1? ( dev-lang/lua:5.1 )
-# lua_targets_lua5-2? ( dev-lang/lua:5.2 )
+# lua_targets_lua5-3? ( dev-lang/lua:5.3 )
 # @CODE
 
 # @ECLASS-VARIABLE: LUA_REQUIRED_USE
@@ -178,7 +174,7 @@ EXPORT_FUNCTIONS pkg_setup
 #
 # Example value:
 # @CODE
-# || ( lua_targets_lua5-1 lua_targets_lua5-2 )
+# || ( lua_targets_lua5-1 lua_targets_lua5-3 )
 # @CODE
 
 # @ECLASS-VARIABLE: LUA_SINGLE_USEDEP
@@ -215,7 +211,7 @@ EXPORT_FUNCTIONS pkg_setup
 #
 # Example value:
 # @CODE
-# lua_targets_lua5-1(-)?,lua_targets_lua5-2(-)?
+# lua_targets_lua5-1(-)?,lua_targets_lua5-3(-)?
 # @CODE
 
 # @FUNCTION: _lua_single_set_globals
@@ -353,7 +349,7 @@ _lua_verify_patterns() {
 
 	local impl pattern
 	for pattern; do
-		for impl in "${_LUA_ALL_IMPLS[@]}"; do
+		for impl in "${_LUA_ALL_IMPLS[@]}" "${_LUA_HISTORICAL_IMPLS[@]}"; do
 			[[ ${impl} == ${pattern/./-} ]] && continue 2
 		done
 
@@ -381,15 +377,15 @@ _lua_verify_patterns() {
 # @CODE
 # LUA_COMPAT=( lua5-{1..3} )
 # RDEPEND="$(lua_gen_cond_dep \
-#     'dev-lua/backported_core_module[${LUA_USEDEP}]' lua5-1 lua5-2 )"
+#     'dev-lua/backported_core_module[${LUA_USEDEP}]' lua5-1 lua5-3 )"
 # @CODE
 #
 # It will cause the variable to look like:
 # @CODE
 # RDEPEND="lua_single_target_lua5-1? (
 #     dev-lua/backported_core_module[lua_targets_lua5-1(-)?,...] )
-#	lua_single_target_lua5-2? (
-#     dev-lua/backported_core_module[lua_targets_lua5-2(-)?,...] )"
+#	lua_single_target_lua5-3? (
+#     dev-lua/backported_core_module[lua_targets_lua5-3(-)?,...] )"
 # @CODE
 lua_gen_cond_dep() {
 	debug-print-function ${FUNCNAME} "${@}"
@@ -441,13 +437,13 @@ lua_gen_cond_dep() {
 # Example:
 # @CODE
 # LUA_COMPAT=( lua5-{1..3} )
-# RDEPEND="foo? ( $(lua_gen_impl_dep 'deprecated(+)' lua5-3 ) )"
+# RDEPEND="foo? ( $(lua_gen_impl_dep 'deprecated(+)' lua5-4 ) )"
 # @CODE
 #
 # It will cause the variable to look like:
 # @CODE
 # RDEPEND="foo? (
-#	lua_single_target_lua5-3? ( dev-lang/lua:5.3[deprecated(+)] )
+#	lua_single_target_lua5-4? ( dev-lang/lua:5.3[deprecated(+)] )
 # )"
 # @CODE
 lua_gen_impl_dep() {