structuredAttrs is enabled

trying https://github.com/unmodeled-tyler/vessel-browser/archive/refs/tags/v0.1.198.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  1.21M   0  1.21M   0      0  1.49M      0                              0
100  1.21M   0  1.21M   0      0  1.49M      0                              0
100  1.21M   0  1.21M   0      0  1.49M      0                              0
unpacking source archive /nix/var/nix/builds/nix-30332-4185888333/download.tar.gz