these 3 derivations will be built:
  /nix/store/7p6sk69c2pcqms834jx881ln2isyn1p2-source.drv
  /nix/store/7z5mma8bawbn6v8qndgn7w9vwk6dx92h-harmonia-deps-3.2.0.drv
  /nix/store/vpqxwjcam1bfpgrflg5mqfhkvkgf7a3l-harmonia-3.2.0.drv