diff --git a/overlay.nix b/overlay.nix
index b462a0b285f87d57a287f93a4853465825863b06..565447704d0672b31bc81d857b7f756dbe9a3719 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -207,6 +207,8 @@ final: prev: with pkgs.haskell.lib; {
 
   servant-client = prev.callCabal2nix "servant-client" (inputs.servant + /servant-client) { };
 
+  servant-foreign = prev.callCabal2nix "servant-foreign" (inputs.servant + /servant-foreign) { };
+
   serialise = doJailbreak (prev.callCabal2nix "serialise" (inputs.cborg + /serialise) { });
 
   singleton-bool = doJailbreak prev.singleton-bool;