these 2 derivations will be built:
  /nix/store/5abm7sabla33y4ms2igjwsncvsahh2yn-nix-grpc-store-0.1.0.drv
  /nix/store/8wms8aahkswxx3h451yfjpirkqqzkdpj-nix-grpc-store-exit-stress.drv