structuredAttrs is enabled

trying https://github.com/XMLTV/xmltv/archive/v1.4.0.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
100 776.7k   0 776.7k   0      0 864.9k      0                              0
100 776.7k   0 776.7k   0      0 864.8k      0                              0
100 776.7k   0 776.7k   0      0 864.8k      0                              0
unpacking source archive /nix/var/nix/builds/nix-23035-3062751610/download.tar.gz