these 2 derivations will be built:
  /nix/store/a88f5sddlm8251w2gn98h6bj3p47gjvf-nix-grpc-store-0.2.2.drv
  /nix/store/vx31qyh1qrwimjwhprkivl4x5i6xcfym-nix-grpc-store-dispatcher.drv