diff --git a/pkgs/games/steam/chrootenv.nix b/pkgs/games/steam/chrootenv.nix
index c44a166268cc..4de5f6608186 100644
--- a/pkgs/games/steam/chrootenv.nix
+++ b/pkgs/games/steam/chrootenv.nix
@@ -3,6 +3,7 @@
 , withJava ? false
 , withPrimus ? false
 , extraPkgs ? pkgs: [ ] # extra packages to add to targetPkgs
+, extraProfile ? "" # string to append to profile
 , nativeOnly ? false
 , runtimeOnly ? false
 }:
@@ -178,7 +179,7 @@ in buildFHSUserEnv rec {
 
   profile = ''
     export STEAM_RUNTIME=${if nativeOnly then "0" else "/steamrt"}
-  '';
+  '' + extraProfile;
 
   runScript = writeScript "steam-wrapper.sh" ''
     #!${stdenv.shell}