structuredAttrs is enabled

trying https://github.com/1jehuang/jcode/archive/refs/tags/v0.89.0.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 20.04M   0 20.04M   0      0 16.76M      0           00:01         20.02M
100 48.75M   0 48.75M   0      0 22.20M      0           00:02         24.36M
100 77.40M   0 77.40M   0      0 24.21M      0           00:03         25.79M
100 106.6M   0 106.6M   0      0 25.41M      0           00:04         26.65M
100 125.2M   0 125.2M   0      0 24.05M      0           00:05         24.98M
100 148.2M   0 148.2M   0      0 23.87M      0           00:06         25.57M
100 166.8M   0 166.8M   0      0 23.08M      0           00:07         23.47M
100 173.4M   0 173.4M   0      0 21.38M      0           00:08         23.47M
100 173.4M   0 173.4M   0      0 21.38M      0           00:08         23.47M
100 173.4M   0 173.4M   0      0 21.38M      0           00:08         23.47M
unpacking source archive /nix/var/nix/builds/nix-47561-376009666/download.tar.gz