structuredAttrs is enabled

trying https://github.com/sipyourdrink-ltd/bernstein/archive/refs/tags/v3.14.159.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
100 23.49M   0 23.49M   0      0  7.73M      0           00:03          8.95M
unpacking source archive /nix/var/nix/builds/nix-76292-3085640203/download.tar.gz