these 2 derivations will be built:
  /nix/store/iwjwy6g4qvbhjfhdr2y259akp22l6qq2-nix-grpc-store-0.2.3.drv
  /nix/store/xklq85fj7wf1lfn6ckjis6ppsk3gzxd9-nix-grpc-store-exit-stress.drv