these 3 derivations will be built:
  /nix/store/g9ff30a5b6jcakaznbzqbsdqhss5g7yh-source.drv
  /nix/store/qvmrxx4ciz5s7qgj5ag60qsrc3sgc47b-harmonia-deps-3.2.0.drv
  /nix/store/sbj9pz8dpjx3rp66v7xm4whi0gsxjkli-harmonia-clippy-3.2.0.drv