these 2 derivations will be built:
  /nix/store/prs1sry126rdd0prvcrrf5m9nkcbrdhx-nix-grpc-store-0.1.0.drv
  /nix/store/1a9nb81h5ykq5sk6xpnpa3xdyx2wmlda-nix-grpc-store-exit-stress.drv