these 2 derivations will be built:
  /nix/store/9z848s1dzmza0642d7p2m3a6k1mfih89-nix-grpc-store-0.2.2.drv
  /nix/store/a2fqhyxf087sjw9kf71m8bql1zx836p8-nix-grpc-store-exit-stress.drv