structuredAttrs is enabled

trying https://github.com/ctxrs/ctx/archive/refs/tags/v2.1.0.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  4.73M   0  4.73M   0      0  3.98M      0           00:01          4.72M
100  9.96M   0  9.96M   0      0  5.70M      0           00:01          4.72M
100  9.96M   0  9.96M   0      0  5.70M      0           00:01          4.72M
100  9.96M   0  9.96M   0      0  5.70M      0           00:01          4.72M
unpacking source archive /nix/var/nix/builds/nix-10867-2213387402/download.tar.gz