these 2 derivations will be built:
  /nix/store/jmb2dmb3w6xznd0blpxnd2xl7b8p4wxi-nix-grpc-store-0.2.3.drv
  /nix/store/nrmbjcic6wdpnxcsw1q1kckn45pyl7i9-nix-grpc-store-dispatcher.drv