these 2 derivations will be built:
  /nix/store/njanhrd9mjf5gx9wcck9npmi7rbpppf1-nix-grpc-store-0.1.0.drv
  /nix/store/zifpk6qhlidsclb9pxjv2z4ls4qkhjn7-nix-grpc-store-exit-stress.drv