structuredAttrs is enabled

trying https://github.com/sipyourdrink-ltd/bernstein/archive/refs/tags/v3.18.1.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 10.34M   0 10.34M   0      0  8.40M      0           00:01         10.07M
100 18.25M   0 18.25M   0      0  8.07M      0           00:02          8.87M
100 22.94M   0 22.94M   0      0  8.21M      0           00:02          8.87M
100 22.94M   0 22.94M   0      0  8.21M      0           00:02          8.87M
100 22.94M   0 22.94M   0      0  8.21M      0           00:02          8.87M
unpacking source archive /nix/var/nix/builds/nix-28665-4005042824/download.tar.gz