diff --git a/pkgs/development/haskell-modules/generic-builder.nix b/pkgs/development/haskell-modules/generic-builder.nix
index 7e7720dd9f82..4d12e580a9c5 100644
--- a/pkgs/development/haskell-modules/generic-builder.nix
+++ b/pkgs/development/haskell-modules/generic-builder.nix
@@ -1134,8 +1134,8 @@ lib.fix (
     // optionalAttrs (disallowedRequisites != [ ] || disallowGhcReference) {
       disallowedRequisites = disallowedRequisites ++ (if disallowGhcReference then [ ghc ] else [ ]);
     }
-    // optionalAttrs (__darwinAllowLocalNetworking || args ? __darwinLocalNetworking) {
-      __darwinAllowLocalNetworking = true;
+    // optionalAttrs (__darwinAllowLocalNetworking || args ? __darwinAllowLocalNetworking) {
+      inherit __darwinAllowLocalNetworking;
     }
   )
 )