these 2 derivations will be built:
  /nix/store/a1vwkndczxlv3b9f515yjmi46f18c5i2-nix-grpc-store-0.1.0.drv
  /nix/store/wg5iy80x4dhq6nhwjzmjzxrm49sbhy56-nix-grpc-store-exit-stress.drv