diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index 7dec0ab..55935eb 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -88,8 +88,8 @@
         extraPrefs
         extraPolicies
         nativeMessagingHosts
-        gtk3
         cfg;
+      gtk3 = prev.gtk3;
     }) {
       applicationName = "firefox-esr";
       desktopName = "Firefox ESR (Sandboxed)";