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by one-punch 527 days ago
You might be interested in nickel (https://nickel-lang.org/), which is a modern take on configuration management based on the experience of Nix/NixOS configurations: purely functional configuration, built-in validation (types & contracts), reusable (functions, modules, defaults), and in addition exports to Yaml, Json, etc.

To integrate nickel with nix, see how organist (https://github.com/nickel-lang/organist) does DevShell management.