these 2 derivations will be built:
  /nix/store/12rvvs9bydpmsz1xwraigmacip7s0krv-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/ib9c5kxfzpfjqpprjgi4zn719xa039iz-nix-grpc-store-dispatcher.drv