these 2 derivations will be built:
  /nix/store/5v1zg1w9w5r0p9hr0nsyi1kdzgw73kpp-nix-grpc-store-0.2.3.drv
  /nix/store/176fldkwxdahm0vh792n5g34h2nq8p9n-nix-grpc-store-dispatcher.drv