structuredAttrs is enabled

trying https://files.pythonhosted.org/packages/b5/d1/d4cd9fe89c7d400d7a18f86ccc94daa3f0927f53558846fcb60791dce5d6/msgspec-0.21.1-cp312-cp312-manylinux2014_x86_64.manylinux_2_17_x86_64.manylinux_2_28_x86_64.whl
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed
100 219.7k 100 219.7k   0      0  4.83M      0                              0