structuredAttrs is enabled

trying https://github.com/Willxup/cpa-usage-keeper/archive/refs/tags/v1.15.6.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  8.35M   0  8.35M   0      0  9.44M      0                              0
100  8.35M   0  8.35M   0      0  9.44M      0                              0
100  8.35M   0  8.35M   0      0  9.44M      0                              0
unpacking source archive /nix/var/nix/builds/nix-15957-972503868/download.tar.gz