diff --git a/overlays/nixpak/firefox.nix b/overlays/nixpak/firefox.nix
index 7c4fa53..96f07cc 100644
--- a/overlays/nixpak/firefox.nix
+++ b/overlays/nixpak/firefox.nix
@@ -59,7 +59,7 @@
             "/etc/resolv.conf"
             "/etc/localtime"
             ["${prev.firefox-esr}/lib/firefox" "/app/etc/firefox"]
-            [ "/etc/firefox/policies" "/app/etc/firefox/policies" ]
+            [ "/etc/firefox/policies/policies.json" "/app/etc/firefox/policies/policies.json" ]
             (sloth.concat' sloth.xdgConfigHome "/dconf")
             (sloth.concat' sloth.xdgConfigHome "/gtk-2.0")
             (sloth.concat' sloth.xdgConfigHome "/gtk-3.0")