these 2 derivations will be built:
  /nix/store/qylh849l9jy752jz5arc9cwmj5k8r1fy-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/0z9ssnd1zz95w3x9fc44k9yjdiw9rk96-nix-grpc-store-exit-stress.drv