these 2 derivations will be built:
  /nix/store/790qwv5ihgmadal7mysp21vn9liqfq3l-nix-grpc-store-0.2.2.drv
  /nix/store/g6x16dcckm8d006w5dfz4gbbdkwhcf35-nix-grpc-store-exit-stress.drv