these 2 derivations will be built:
  /nix/store/q66722ry3k5jqmb2vbh1hqknpdz5vgqy-droid-0.250.0.drv
  /nix/store/0wzwki6aqb8cywd1kz3wgcx2qj6r0lzd-check-droid.drv