then again it may not be exactly what your using for.
i tend to move out ‘machine specific configuration’ into it’s own .nix file
if your using flakes, you use the modules part to import it.
However, how please lay out their configuration files fo nix, is really up to the user.
However, there are some great examples out there on the internet, you can use sourcegraph.com
with lang:nix configuration.nix to find lots and lots and lots of examples.