diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index 419c7cd..b39f5e5 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -75,7 +75,21 @@
       };
     };
   in
-    prev.wrapFirefox sandboxed-firefox-esr.config.env {
+    prev.wrapFirefox (sandboxed-firefox-esr.config.env // {
+      inherit (prev.firefox-esr)
+        version
+        meta
+        langPath
+        updateScript
+        pkgconfig
+        buildPackages
+        patches
+        extraPatches
+        extraPrefs
+        extraPolicies
+        nativeMessagingHosts
+        cfg;
+    }) {
       applicationName = "firefox-esr-sandboxed";
       desktopName = "Firefox ESR (Sandboxed)";
     };