these 3 derivations will be built:
  /nix/store/41y42kvawn37pk4h48w4ipnqja6gnak3-source.drv
  /nix/store/56cvzpqvqbvzan6mj5ijwafkdmz6zfn8-harmonia-deps-3.2.0.drv
  /nix/store/kwfzn222q0gijwkb6y8kyqs121k6s9vz-harmonia-3.2.0.drv