these 2 derivations will be built:
  /nix/store/hpd4ljk32l51ncj64a5vmj97gb298afl-nix-grpc-store-0.1.0.drv
  /nix/store/ai984k0syg14q5jg8dz0ibhw7nf14vwg-nix-grpc-store-dispatcher.drv