structuredAttrs is enabled

trying https://github.com/nix-community/nix-index-database/releases/download/2026-09-20-075601/index-x86_64-linux
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
  0      0   0      0   0      0      0      0                              0
100 101.8M 100 101.8M   0      0 69.80M      0   00:01   00:01         80.58M