structuredAttrs is enabled

trying https://github.com/dense-analysis/ale/archive/9e2efaa4d348b1f93200b24e5540c670eb6fdd3f.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
100 477.1k   0 477.1k   0      0 913.0k      0                              0
unpacking source archive /nix/var/nix/builds/nix-56206-1805639005/download.tar.gz