structuredAttrs is enabled

trying https://github.com/backnotprop/plannotator/archive/refs/tags/v0.27.10.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 12.29M   0 12.29M   0      0  7.45M      0           00:01          8.49M
100 36.14M   0 36.14M   0      0 15.72M      0           00:02          8.49M
100 36.14M   0 36.14M   0      0 15.72M      0           00:02          8.49M
100 36.14M   0 36.14M   0      0 15.72M      0           00:02          8.49M
unpacking source archive /nix/var/nix/builds/nix-42917-4053236475/download.tar.gz