these 3 derivations will be built:
  /nix/store/5qcbfakf9w1222w6pp6z7s4afwnk9888-droid.drv
  /nix/store/0w81l44rri5d7av22axvl8gn26yilrf7-droid-1.9.1.drv
  /nix/store/rljix2338qhj2dplbk4iri9kjl60f0fy-check-droid.drv