these 2 derivations will be built:
  /nix/store/n55k0bigns1cbnl0r3rfw5gsplacgc6i-nix-grpc-store-0.1.0-beta.4.drv
  /nix/store/9jf9dl12xqnajylh4fc80cjsapighy2h-nix-grpc-store-dispatcher.drv