structuredAttrs is enabled

trying https://github.com/tailscale/setec/archive/f8d7a936837c8bdb8e1af9fd99158f9b5551dbad.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  93478   0  93478   0      0 134.2k      0                              0
100  93478   0  93478   0      0 134.2k      0                              0
100  93478   0  93478   0      0 134.2k      0                              0
unpacking source archive /nix/var/nix/builds/nix-15682-2059389002/download.tar.gz