these 2 derivations will be built:
  /nix/store/l7jbhl5vv5q4966i8a6l3akdiqgc9ymc-nix-grpc-store-0.2.3.drv
  /nix/store/fa41l2xgch78krxhvi5w0ck1y2vl56l4-nix-grpc-store-dispatcher.drv