these 2 derivations will be built:
  /nix/store/b82xr5gfi59476r8169wiqybsglxkjgm-nix-grpc-store-0.1.0.drv
  /nix/store/93gz7gd6iqdnz4z6j6l8j5nhwymqflwc-nix-grpc-store-exit-stress.drv