calculate-overlay/games-util/steam-launcher/files/steam-set-distrib-release.patch

diff -Naur a/steam b/steam
--- a/steam	2016-08-14 18:38:48.226504733 +0100
+++ b/steam	2016-08-14 18:43:41.709271991 +0100
@@ -35,6 +35,9 @@
 : ${STEAM_RUNTIME:=@@STEAM_RUNTIME@@}
 export STEAM_RUNTIME
 
+# Gentoo's lsb-release doesn't set this.
+export DISTRIB_RELEASE="2.2"
+
 function show_message()
 {
 	style=$1