structuredAttrs is enabled

trying https://github.com/1jehuang/jcode/archive/refs/tags/v0.90.0.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  1.00M   0  1.00M   0      0 816.2k      0           00:01         967.6k
100 28.45M   0 28.45M   0      0 12.11M      0           00:02         13.22M
100 62.64M   0 62.64M   0      0 18.70M      0           00:03         19.88M
100 91.50M   0 91.50M   0      0 21.02M      0           00:04         22.03M
100 111.5M   0 111.5M   0      0 20.18M      0           00:05         20.94M
100 134.0M   0 134.0M   0      0 20.54M      0           00:06         25.31M
100 155.0M   0 155.0M   0      0 20.59M      0           00:07         24.44M
100 167.7M   0 167.7M   0      0 19.64M      0           00:08         20.24M
100 173.5M   0 173.5M   0      0 18.44M      0           00:09         20.24M
100 173.5M   0 173.5M   0      0 18.44M      0           00:09         20.24M
100 173.5M   0 173.5M   0      0 18.44M      0           00:09         20.24M
unpacking source archive /nix/var/nix/builds/nix-27513-807709949/download.tar.gz