diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 23eae3a5598..f1fb8910d51 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1684,7 +1684,7 @@ let
   ihaskell-with-packages = callPackage ../development/tools/haskell/ihaskell/ng-wrapper.nix {
     inherit (pythonPackages) ipython;
     inherit (haskellngPackages) ihaskell ghcWithPackages;
-    packages = self: config.ihaskell.packages or [];
+    packages = config.ihaskell.packages or (self: []);
   };
 
   imapproxy = callPackage ../tools/networking/imapproxy { };