these 2 derivations will be built:
  /nix/store/11aiphvqb4rhf388x2sll04yxjj5jjhi-nix-grpc-store-0.2.0.drv
  /nix/store/x2hi2hv7ap562gq0bzbcdkylxf6rvsvj-nix-grpc-store-dispatcher.drv