Ah my apologies - We use Bazel to build our services, and the output artifacts were then pulled into Nix and deployed as Nix packages. Bazel has _excellent_ support taking the same application code and creating Docker images from them (https://github.com/bazelbuild/rules_docker#language-rules), and the tools available for deploying containers is orders of magnitude more feature-full and higher quality than what you get with Nix today. So we no longer have Nix anywhere in our pipeline, and all of our artifacts are now deployed inside containers.