these 3 derivations will be built:
  /nix/store/zlhq07z5apy10y794m437ka58nkiv50l-source.drv
  /nix/store/adi09yk0dsf9p1f1qck82kyyyihncfac-harmonia-deps-3.2.0.drv
  /nix/store/5hcpsrr7b9wp55kacypxg1ml0vx463dd-harmonia-3.2.0.drv