these 2 derivations will be built:
  /nix/store/bx9rk3idf207s6vmmwvvzvhbjqdf1prm-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/qx556frghfwf7klbmjazgmsbb31y9pv9-nix-grpc-store-dispatcher.drv