these 3 derivations will be built:
  /nix/store/1hxqw5qccxvavaj8dgxr9m5kgvs5nmq2-source.drv
  /nix/store/ds90f1sdrird4wann24yjcrybv86aj8d-harmonia-deps-3.2.0.drv
  /nix/store/ca5h24kfkfwyl1lf6jjm2nf3pqc63kcc-harmonia-3.2.0.drv