these 2 derivations will be built:
  /nix/store/wvz7qka3l90j4zyri6z9m4smsv9d9q3n-nix-grpc-store-0.1.0-beta.1.drv
  /nix/store/bdjlh71d980x9aidyqh93z3fjrj6j8l2-nix-grpc-store-exit-stress.drv