these 2 derivations will be built:
  /nix/store/im15622ym6zslcsknaq16nw90im8i3jx-nix-grpc-store-0.2.2.drv
  /nix/store/xi97rqzwang20b5b2spgjc0h30zyz3zh-nix-grpc-store-exit-stress.drv