structuredAttrs is enabled

trying https://static.crates.io/crates/secp256k1-sys/0.10.1/download
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100  2.50M 100  2.50M   0      0 18.12M      0                              0