structuredAttrs is enabled

trying https://static.crates.io/crates/kem/0.3.0-pre.0/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100   6286 100   6286   0      0 354.4k      0                              0