diff --git a/nix/PaymentServer.nix b/nix/PaymentServer.nix
index b70939de79fd499051ef4b007e3704067d81e9c1..c28f636062ba48bec5b118dfe8c946d2a7b44b31 100644
--- a/nix/PaymentServer.nix
+++ b/nix/PaymentServer.nix
@@ -64,6 +64,7 @@ in { system, compiler, flags, pkgs, hsPkgs, pkgconfPkgs, ... }:
           (hsPkgs."servant-server" or (buildDepError "servant-server"))
           (hsPkgs."wai" or (buildDepError "wai"))
           (hsPkgs."wai-extra" or (buildDepError "wai-extra"))
+          (hsPkgs."wai-cors" or (buildDepError "wai-cors"))
           (hsPkgs."data-default" or (buildDepError "data-default"))
           (hsPkgs."warp" or (buildDepError "warp"))
           (hsPkgs."warp-tls" or (buildDepError "warp-tls"))