diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index d5c26d1..0cfbab7 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -3,7 +3,7 @@
 # https://github.com/schizofox/schizofox/blob/cdf69b2a445ff12680657a3bd44ce7c406bf2ae6/flake/modules/home-manager/default.nix
 
 { ... }: final: prev: {
-  firefox-esr-wrapped = let
+  firefox-esr-wrapped = cfg: let
     sandboxFirefox = base: let
       sandboxed = prev.mkNixPak {
         config = { sloth, ... }: {
@@ -80,11 +80,10 @@
         meta
         browserName
         binaryName
-        version
-        cfg;
+        version;
 
       unwrapped = prev.firefox-esr;
     };
   in
-    sandboxFirefox prev.firefox-esr;
+    sandboxFirefox (prev.firefox-esr.override (oldAttrs: { inherit cfg; }));
 }