these 2 derivations will be built:
  /nix/store/d8wflqs73s29wsw1w234macdhs828nr8-nix-grpc-store-0.2.3.drv
  /nix/store/n1hanw3ihvzyanq4dbjg6fm8fygncji2-nix-grpc-store-exit-stress.drv