structuredAttrs is enabled

trying https://static.crates.io/crates/ark-bls12-381/0.5.0/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100 467.0k 100 467.0k   0      0  2.61M      0                              0