structuredAttrs is enabled

trying https://github.com/nix-community/nix-index-database/releases/download/2026-07-26-054738/index-aarch64-darwin
  % 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 56.78M 100 56.78M   0      0 10.23M      0   00:05   00:05          9.96M