diff --git a/pkgs/by-name/ni/nix-index-unwrapped/package.nix b/pkgs/by-name/ni/nix-index-unwrapped/package.nix
index 9a22bd3cf401..060f79e0ff17 100644
--- a/pkgs/by-name/ni/nix-index-unwrapped/package.nix
+++ b/pkgs/by-name/ni/nix-index-unwrapped/package.nix
@@ -13,6 +13,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
   pname = "nix-index";
   version = "0.1.10";
 
+  __structuredAttrs = true;
+
   src = fetchFromGitHub {
     owner = "nix-community";
     repo = "nix-index";