these 2 derivations will be built:
  /nix/store/hq4q7v8ky05l35gz8jyzy1n3x9cd9yng-nix-grpc-store-0.2.3.drv
  /nix/store/nf7156g01yca6nfhff7q6ravf79hi8r6-nix-grpc-store-exit-stress.drv