these 3 derivations will be built:
  /nix/store/kfmxr04ykvkc854kkr813xka8bgi4w2w-droid.drv
  /nix/store/5jj82rvpg05rw026qnqmmsajaj9k3wq3-droid-1.7.0.drv
  /nix/store/kqk1w0kxyiyx6n0mh26n9qzvdbxjzdsv-check-droid.drv