structuredAttrs is enabled

trying https://github.com/sipyourdrink-ltd/bernstein/archive/refs/tags/v3.17.1.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 10.50M   0 10.50M   0      0  8.68M      0           00:01         10.36M
100 18.50M   0 18.50M   0      0  8.30M      0           00:02          9.10M
100 22.83M   0 22.83M   0      0  8.43M      0           00:02          9.10M
100 22.83M   0 22.83M   0      0  8.43M      0           00:02          9.10M
100 22.83M   0 22.83M   0      0  8.43M      0           00:02          9.10M
unpacking source archive /nix/var/nix/builds/nix-81204-775152230/download.tar.gz