diff --git a/pkgs/development/haskell-modules/lib.nix b/pkgs/development/haskell-modules/lib.nix
index 289fa4b77363..b730ef9b2ed7 100644
--- a/pkgs/development/haskell-modules/lib.nix
+++ b/pkgs/development/haskell-modules/lib.nix
@@ -387,7 +387,7 @@ rec {
   #
   # packagesFromDirectory : Directory -> HaskellPackageOverrideSet
   packagesFromDirectory =
-    { directory }:
+    { directory, ... }:
 
     self: super:
       let