diff --git a/overlays/nixpkgs/firefox.nix b/overlays/nixpkgs/firefox.nix
index cc61d68..5eee596 100644
--- a/overlays/nixpkgs/firefox.nix
+++ b/overlays/nixpkgs/firefox.nix
@@ -5,6 +5,7 @@
     sandboxed-firefox-esr = pkgs.mkNixPak {
       config = { sloth, ... }: {
         app.package = pkgs.firefox-esr;
+        app.binPath = "bin/firefox-esr";
         flatpak.appId = "org.mozilla.firefox";
         dbus.policies = {
           "org.mozilla.Firefox" = "own";