these 2 derivations will be built:
  /nix/store/4ww4sh2q0fryg52khiv172f7q5p6mavf-nix-grpc-store-0.1.0.drv
  /nix/store/vhxcs5kf8nd1nzykbaqkd11jhdls7ba9-nix-grpc-store-exit-stress.drv