diff --git a/pkgs/additional/firefox-extensions/browserpass-extension/default.nix b/pkgs/additional/firefox-extensions/browserpass-extension/default.nix
index 0081d92e..dacb4df1 100644
--- a/pkgs/additional/firefox-extensions/browserpass-extension/default.nix
+++ b/pkgs/additional/firefox-extensions/browserpass-extension/default.nix
@@ -65,6 +65,7 @@ in stdenv.mkDerivation {
   '';
 
   passthru = {
+    yarn-modules = browserpass-extension-yarn-modules;
     extid = "browserpass@maximbaz.com";
   };
 }