these 2 derivations will be built:
  /nix/store/9r2z6x5bdvpx8fimxswxrr512wqh30dl-nix-grpc-store-0.1.0.drv
  /nix/store/zia643pdbblimyyg0xr0d7navxmdrkvz-nix-grpc-store-dispatcher.drv