these 2 derivations will be built:
  /nix/store/sk87mhnmh6fx859jy6d85lkhksa4fhpj-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/qfg167jswzlm7jh3yl2wzinsvxk4mi9f-nix-grpc-store-dispatcher.drv