nix home manager is very good.

The idea is that instead of creating a bunch of dotfiles and having to read a bunch of documentation, one declaratively states which features they want, say, for zsh or vim or git or xdg, etc; and then home-manager will create and manage them (typically they live in `$HOME/.config/whatever`).

https://github.com/nix-community/home-manager. Some examples on GitHub: https://github.com/search?q=filename%3Ahome.nix.