these 2 derivations will be built:
  /nix/store/mqcmqbpv01q73i84vz3644j830q6n5qa-nix-grpc-store-0.1.0.drv
  /nix/store/j032axzsr2knvz4pxd07blia5zfs0s7v-nix-grpc-store-exit-stress.drv