structuredAttrs is enabled

trying https://github.com/ctxrs/ctx/archive/refs/tags/v1.4.7.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  5.75M   0  5.75M   0      0  4.65M      0           00:01          5.75M
100  6.00M   0  6.00M   0      0  4.82M      0           00:01          5.75M
100  6.00M   0  6.00M   0      0  4.82M      0           00:01          5.75M
100  6.00M   0  6.00M   0      0  4.82M      0           00:01          5.75M
unpacking source archive /nix/var/nix/builds/nix-50645-731767040/download.tar.gz