structuredAttrs is enabled

trying https://github.com/kucherenko/jscpd/archive/refs/tags/v5.3.3.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
100 533.3k   0 533.3k   0      0 425.3k      0           00:01         527.8k
100  1.66M   0  1.66M   0      0  1.16M      0           00:01         527.8k
100  1.66M   0  1.66M   0      0  1.16M      0           00:01         527.8k
100  1.66M   0  1.66M   0      0  1.16M      0           00:01         527.8k
unpacking source archive /nix/var/nix/builds/nix-23584-1592123490/download.tar.gz