these 2 derivations will be built:
  /nix/store/i09mdzg4dn2ilh73ba2xdz1mvszskl40-nix-grpc-store-0.1.0.drv
  /nix/store/67gnki1cr7r0q01q758rvc6ab413dn3c-nix-grpc-store-exit-stress.drv