diff --git a/pkgs/build-support/dlang/builddubpackage/default.nix b/pkgs/build-support/dlang/builddubpackage/default.nix
index 8ce675a5644b..9785e2f89c74 100644
--- a/pkgs/build-support/dlang/builddubpackage/default.nix
+++ b/pkgs/build-support/dlang/builddubpackage/default.nix
@@ -35,6 +35,7 @@ lib.extendMkDerivation {
       };
 
       strictDeps = args.strictDeps or true;
+      __structuredAttrs = args.__structuredAttrs or true;
 
       nativeBuildInputs = args.nativeBuildInputs or [ ] ++ [
         dubSetupHook