diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index 983173a..804ac71 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -4,9 +4,9 @@
 
 { ... }: final: prev: {
   firefox-esr = let
-    sandboxed-firefox-esr = cfg: prev.mkNixPak {
+    sandboxed-firefox-esr = prev.mkNixPak {
       config = { sloth, ... }: {
-        app.package = prev.firefox-esr.overrides cfg;
+        app.package = prev.firefox-esr;
         app.binPath = "bin/firefox-esr";
         flatpak.appId = "org.mozilla.firefox";