structuredAttrs is enabled

trying https://github.com/ctxrs/ctx/archive/refs/tags/v1.6.3.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  6.50M   0  6.50M   0      0  5.26M      0           00:01          6.43M
100  8.96M   0  8.96M   0      0  6.18M      0           00:01          6.43M
100  8.96M   0  8.96M   0      0  6.18M      0           00:01          6.43M
100  8.96M   0  8.96M   0      0  6.18M      0           00:01          6.43M
unpacking source archive /nix/var/nix/builds/nix-23727-1818581985/download.tar.gz