these 2 derivations will be built:
  /nix/store/p5b1fmi76l6dhbbqlzyilrca82s4116y-nix-grpc-store-0.2.3.drv
  /nix/store/1vp2zgw6z3q3n8m7fjmrvg2v66z3356b-nix-grpc-store-dispatcher.drv