these 2 derivations will be built:
  /nix/store/f4nwcma656123lrdpgx6fjfgpxlr5h7c-nix-grpc-store-0.2.2.drv
  /nix/store/689s4jyq2xd87bzs2sr51m5f5906yh34-nix-grpc-store-dispatcher.drv