structuredAttrs is enabled

trying https://github.com/ctxrs/ctx/archive/refs/tags/v1.5.0.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  6.57M   0  6.57M   0      0  5.36M      0           00:01          6.57M
100  8.87M   0  8.87M   0      0  6.20M      0           00:01          6.57M
100  8.87M   0  8.87M   0      0  6.20M      0           00:01          6.57M
100  8.87M   0  8.87M   0      0  6.20M      0           00:01          6.57M
unpacking source archive /nix/var/nix/builds/nix-47852-785714320/download.tar.gz