these 2 derivations will be built:
  /nix/store/3n5b6p0ym7clyasvxjzla9h3k1pp892m-nix-grpc-store-0.2.2.drv
  /nix/store/1mh4valixc63c49aps91wm6ljjn01n2b-nix-grpc-store-exit-stress.drv