these 3 derivations will be built:
  /nix/store/xmyfc2npdz14sslhhd7v3nfcrblrarwq-droid.drv
  /nix/store/cpgr297yxzz613yscn5ml755riz58pzr-droid-1.6.0.drv
  /nix/store/92bdr5q7j690sjgx4kjlznwg980hm9iw-check-droid.drv