these 2 derivations will be built:
  /nix/store/6r4dxzlk78ygdwzapfbk6jx1vf7i14ll-nix-grpc-store-0.2.3.drv
  /nix/store/8gxd1mypsl3czc7svf6j7m4xcx24m3dn-nix-grpc-store-dispatcher.drv