@arichtman @uep so, recently I knew of #Nixidy (from its author @arnar). This is not what you stated, but you could benefit from the implementation:
https://github.com/arnarg/nixidy
GitHub - arnarg/nixidy: Kubernetes GitOps with nix and Argo CD.

Kubernetes GitOps with nix and Argo CD. Contribute to arnarg/nixidy development by creating an account on GitHub.

GitHub
Well, mindlessly scrolling through @jakehamilton|s feed and I found #nixidy, which looks rather promising
@arnar that's very interesting approach to cluster management, and what's better is that I'm already using all the pieces and just need the glue packaged as #Nixidy !