structuredAttrs is enabled

trying https://github.com/backnotprop/plannotator/archive/refs/tags/v0.27.21.tar.gz
  % Total    % Received % Xferd  Average Speed  Time    Time    Time   Current
                                 Dload  Upload  Total   Spent   Left   Speed

  0      0   0      0   0      0      0      0                              0
  0      0   0      0   0      0      0      0                              0
  0      0   0      0   0      0      0      0                              0

  0      0   0      0   0      0      0      0                              0
100 22.07M   0 22.07M   0      0 18.15M      0           00:01         22.07M
100 51.78M   0 51.78M   0      0 23.22M      0           00:02         25.70M
100 58.63M   0 58.63M   0      0 20.86M      0           00:02         25.70M
100 58.63M   0 58.63M   0      0 20.86M      0           00:02         25.70M
100 58.63M   0 58.63M   0      0 20.85M      0           00:02         25.70M
unpacking source archive /nix/var/nix/builds/nix-98593-1766041931/download.tar.gz