Nix / NixOS

Hi! I'm trying out Nix and I'm trying to set up and organize everything. Usually I put all my configs in a directory which is also a git repo and synced to my NAS, using the same subfolders they'd be in, and use GNU Stow to symlink the top-level folders (/dotfiles/home/ to /home/username/, /dotfiles/etc to /etc and /dotfiles/usr to /usr) and let it do its thing. Would it cause problems to also do that for configuration.nix?

On Arch I already had a /dotfiles/etc symlinked to /etc for my custom keyboard layouts, which worked fine... until the update which moved the location of the GUI keyboard layouts. It prevented the update so I undid the symlinks, updated, and put them again to the new location... but somehow it broke everything except the tty and no Wayland compositor I tried would work anymore (and there went my record of having never broken Arch since the first install over a year ago 😅 )

So I'm kinda wary of doing it on an even more critical file... but also I'm very lazy and having everything in a single repo is very convenient... How do you do it?