structuredAttrs is enabled

trying https://github.com/MrLesk/Backlog.md/archive/refs/tags/v1.53.0.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  6.92M 100  6.92M   0      0 11.10M      0                              0
100  6.92M 100  6.92M   0      0 11.10M      0                              0
100  6.92M 100  6.92M   0      0 11.10M      0                              0
unpacking source archive /nix/var/nix/builds/nix-25525-433790599/download.tar.gz