structuredAttrs is enabled

trying https://static.crates.io/crates/nix/0.23.2/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100 236.3k 100 236.3k   0      0 10.14M      0                              0