these 2 derivations will be built:
  /nix/store/9rx2f03fd5d9ih0s9n6jd068261yzdlm-nix-grpc-store-0.2.2.drv
  /nix/store/fqzgmpmarpqqmd5mvc7xhw787n0nxrqj-nix-grpc-store-dispatcher.drv