these 2 derivations will be built:
  /nix/store/2ff15xlilb5ac21j5nddmw7rchkbvnz4-nix-grpc-store-0.2.2.drv
  /nix/store/2azn5g20zl19yg1lszy4x7v2gk73sgwz-nix-grpc-store-exit-stress.drv