diff --git a/nix/configuration.nix b/nix/configuration.nix
index b6244b3..7be357b 100644
--- a/nix/configuration.nix
+++ b/nix/configuration.nix
@@ -69,7 +69,6 @@
   # And configure cage to show fossbeamer on it.
   services.cage = {
     enable = true;
-    environment.GDK_BACKEND = "x11";
     user = "kiosk";
     program = "${pkgs.fossbeamer}/bin/fossbeamer --default-config=${../default-config.json} https://example.com";
     extraArguments = [