structuredAttrs is enabled

trying https://github.com/ctxrs/ctx/archive/refs/tags/v2.0.1.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  4.76M   0  4.76M   0      0  3.79M      0           00:01          4.70M
100  9.88M   0  9.88M   0      0  5.71M      0           00:01          4.70M
100  9.88M   0  9.88M   0      0  5.71M      0           00:01          4.70M
100  9.88M   0  9.88M   0      0  5.71M      0           00:01          4.70M
unpacking source archive /nix/var/nix/builds/nix-86994-1625617193/download.tar.gz