these 2 derivations will be built:
  /nix/store/1m8z2v79r6g2qnfwd9byr0zqv0x7v2nl-nix-grpc-store-0.1.0.drv
  /nix/store/2zdql7z9f5nkaa2idf8h36k6d82zgpq0-nix-grpc-store-dispatcher.drv