these 2 derivations will be built:
  /nix/store/8z5gfslci9fn6kdck6jqkbvk1k85fnxc-nix-grpc-store-0.1.0.drv
  /nix/store/f5473zzhiiba300qa49alnxlajm2xy4q-nix-grpc-store-exit-stress.drv