these 3 derivations will be built:
  /nix/store/i1hh91jp23i0x3qw9wwpgmai5i9ia257-source.drv
  /nix/store/4nhzl74pgl15yyl4dndsmc5gjdmjb4jd-harmonia-deps-3.3.0.drv
  /nix/store/q1n1qgph2alhrdhkxmghy9byj2hw5ngj-harmonia-clippy-3.3.0.drv