structuredAttrs is enabled

trying https://github.com/backnotprop/plannotator/archive/refs/tags/v0.27.17.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 16.25M   0 16.25M   0      0 13.40M      0           00:01         16.18M
100 42.26M   0 42.26M   0      0 19.06M      0           00:02         21.03M
100 58.45M   0 58.45M   0      0 18.17M      0           00:03         21.03M
100 58.45M   0 58.45M   0      0 18.17M      0           00:03         21.03M
100 58.45M   0 58.45M   0      0 18.17M      0           00:03         21.03M
unpacking source archive /nix/var/nix/builds/nix-57897-176027409/download.tar.gz