these 2 derivations will be built:
  /nix/store/70w3l3hk9lksr09k5kyrqpc2f06cql5m-nix-grpc-store-0.1.0.drv
  /nix/store/49jl3q54gcxvv7mpglk5aipadd45qb0y-nix-grpc-store-dispatcher.drv