these 2 derivations will be built:
  /nix/store/l1vhxlqhmqclr04k4y39hd6jf0b03j2p-nix-grpc-store-0.1.0.drv
  /nix/store/5n05mwwwcn8ga2nm861apdjb6jyikcj5-nix-grpc-store-exit-stress.drv