these 3 derivations will be built:
  /nix/store/17j7sdc935mri6l2gpplxii32zl83v1p-source.drv
  /nix/store/xnfnxprjxg2v8r05kk2q094wc633m3c0-harmonia-deps-3.2.0.drv
  /nix/store/4pva0vlwbgkwi5axpgyv9fsdysafwy3q-harmonia-3.2.0.drv