structuredAttrs is enabled

trying https://github.com/backnotprop/plannotator/archive/refs/tags/v0.27.9.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 22.00M   0 22.00M   0      0 18.27M      0           00:01         21.96M
100 34.44M   0 34.44M   0      0 17.87M      0           00:01         21.96M
100 34.44M   0 34.44M   0      0 17.87M      0           00:01         21.96M
100 34.44M   0 34.44M   0      0 17.87M      0           00:01         21.96M
unpacking source archive /nix/var/nix/builds/nix-13920-3623452654/download.tar.gz