these 2 derivations will be built:
  /nix/store/bsn8jr5iq5i828651x3s03n0lpzzby1q-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/m385cd4a0mh5vrwcfxfyin85z140jk8x-nix-grpc-store-dispatcher.drv