these 3 derivations will be built:
  /nix/store/gnf3989jzj9rp8anlbw15i9wm9yix9cj-source.drv
  /nix/store/7370wrc73225fhbnaz5dk6ni3gpcivyb-harmonia-deps-3.3.0.drv
  /nix/store/bz87lgihap103sfz04ill8j79ylyggyl-harmonia-3.3.0.drv