structuredAttrs is enabled

trying https://github.com/vercel-labs/fx/archive/refs/tags/v0.0.13.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  5.25M   0  5.25M   0      0  4.37M      0           00:01          5.15M
100  6.31M   0  6.31M   0      0  4.77M      0           00:01          5.15M
100  6.31M   0  6.31M   0      0  4.77M      0           00:01          5.15M
100  6.31M   0  6.31M   0      0  4.77M      0           00:01          5.15M
unpacking source archive /nix/var/nix/builds/nix-21369-292869353/download.tar.gz