these 3 derivations will be built:
  /nix/store/kk7xnlaw6c8ywhmdbdnr505lbmcvw5h5-source.drv
  /nix/store/a0l5pcm57bhbxxcp4gsy7rfghj5m46da-harmonia-deps-3.2.0.drv
  /nix/store/3zhiy1n7j38s9q70jn0549vs6zld6x1w-harmonia-3.2.0.drv