these 3 derivations will be built:
  /nix/store/qfslwg2m93jm1c2h8db38h2707aj44qv-source.drv
  /nix/store/gfs5vwjmmbycnnlznpkhslgnpxihda20-harmonia-deps-3.3.0.drv
  /nix/store/9vz5ykyf1sqlvsjvp5a6zjnbd9ayli2h-harmonia-3.3.0.drv