these 2 derivations will be built:
  /nix/store/npzjr9mhjdp7gifmcjwp0g4svwqrcwsv-nix-grpc-store-0.2.3.drv
  /nix/store/bnxi3dklh9cjyilj4gqn495d74xqc1v8-nix-grpc-store-exit-stress.drv