structuredAttrs is enabled

trying https://github.com/kdlbs/kandev/archive/refs/tags/v0.88.0.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  4.26M   0  4.26M   0      0  3.27M      0           00:01          4.13M
100 10.59M   0 10.59M   0      0  4.52M      0           00:02          5.12M
100 16.29M   0 16.29M   0      0  4.87M      0           00:03          5.30M
100 29.94M   0 29.94M   0      0  6.89M      0           00:04          7.35M
100 36.05M   0 36.05M   0      0  7.42M      0           00:04          7.35M
100 36.05M   0 36.05M   0      0  7.42M      0           00:04          7.35M
100 36.05M   0 36.05M   0      0  7.42M      0           00:04          7.35M
unpacking source archive /nix/var/nix/builds/nix-18607-1683613439/download.tar.gz