these 3 derivations will be built:
  /nix/store/44nvg5hi82ja9s8bdcfffb8nqkvlncdz-source.drv
  /nix/store/hm0h405nsciagd6kmchy5mqzvwvfqnpx-harmonia-deps-3.2.0.drv
  /nix/store/w52ds937cgifq3hbm2qgs7j3hlah23fc-harmonia-clippy-3.2.0.drv