these 2 derivations will be built:
  /nix/store/mjbii8m46jj22ipr0n7k4nhsgrr23zic-nix-grpc-store-0.2.3.drv
  /nix/store/3qp3pay9717l37s88hfdfd1926l4rnw2-nix-grpc-store-dispatcher.drv