diff --git a/stack.nix b/stack.nix
index 27cc60e5f..01d3ebc4f 100644
--- a/stack.nix
+++ b/stack.nix
@@ -1,4 +1,4 @@
-{ ghc, nixpkgs ? import ./nixpkgs.nix }:
+{ ghc, nixpkgs ? import ./nixpkgs.nix {} }:
 
 let
   haskellPackages = import ./stackage.nix { inherit nixpkgs; };