dotfiles VS nixed

I do what you describe in a very simple way. It's not really made for multiuser configurations as i mix home-manager config of services and packages with nixos, something i will review one day. It's a flake for macos/linux/nixos but there are certainly other more fancy repositories out there. https://github.com/sebastiant/dotfiles

My dotfiles does almost what you describe. I don't configure mulitple users but it should be pretty clear on how to do that. Hope they are of any help! https://github.com/sebastiant/dotfiles

For reference here's yet another flake example. It's very basic compared to already posted flakes https://github.com/sebastiant/dotfiles

Mine sets up a nixos host, a linux host and a macos host with nix-darwin, all with home manager: https://github.com/sebastiant/dotfiles/blob/master/flake.nix

Check them out here if you want a look.

I don’t like digga myself, but you can check out some of my earlier revisions of my configuration when I was using it. This is the repo.

Check out my Neovim configuration; I think I’ve found a pretty good way of managing all my plugins, LSP servers, and Treesitter parsers declaratively so I don’t have to pull binaries using mason or the provided Treesitter commands.

Inside of your common home.nix file, you can use functions like lib.mkIf and/or lib.mkMerge to conditionally import other files/modules or define options based on the system using attributes like pkgs.stdenv.isLinux; I do this pretty extensively in my own home-manager configurations, check out my kitty configuration for an example. I’m on my phone so I can’t really write any code without it taking a long time, also Reddit formatting sucks.