these 2 derivations will be built:
  /nix/store/h2yyj19rwlcdyhs7ijxrr8xkvx5xwras-nix-grpc-store-0.2.2.drv
  /nix/store/2sslxarf1f9x3j98wvamdx5m2msfsv6z-nix-grpc-store-dispatcher.drv