structuredAttrs is enabled

trying https://github.com/MrLesk/Backlog.md/archive/refs/tags/v1.54.0.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  7.56M   0  7.56M   0      0  6.81M      0           00:01              0
100  7.56M   0  7.56M   0      0  6.81M      0           00:01              0
100  7.56M   0  7.56M   0      0  6.81M      0           00:01              0
unpacking source archive /nix/var/nix/builds/nix-3124909-2967243398/download.tar.gz