Also, I usually manage my home packages separately from my global config. The easiest way to do that is probably by adding a different channel/path to your user’s nix-channels. I believe home-manager uses that. Alternatively you can also do the trick I mentioned in your home.nix file.
Yea, i actually do that for a couple of my dependencies. My problem is there are dozens or hundreds in my OS that instantly upgrade if i change my `nixpkgs` ref. And i have no clue what version _any_ of those are at, off hand.
Eg lets say i want to fix my X - because when i updated my `nixpkgs` pointer Xorg was using a lot of CPU for some reason. There's no lockfile that says what version X is at, or what dependencies X is using or associated with. Is it one package? Is it a half dozen? I could open the repo and dig through the configs to locate it and _try_ to infer what the hell version it's at, and what dependencies it has.. and then find what they're at and so forth - but it's convoluted imo. Much easier in Cargo.lock, for example - something i've done dozens of times before.
In short, basically everything in my OS broke when i updated my nixpkgs ref, and it's non-obvious and maybe non-trivial to understand what versions everything is at. To incrementally try to un-screw my system when i change my nixpkgs.
As i move forward, any packages i install i'm tempted to bind them to very specific inputs. So that when i want to upgrade one thing, only that one thing changes. But this workflow seems difficult in NixOS. Despite it being the workflow that i want.
Well, maybe not difficult - but lots of LOC. Adding dozens of inputs just to change versions of stuff without breaking other things seems like a lot of work for a dependency management system.. imo.
I have a script which I use [1] after updating my Flakes to do just that : know what has been upgraded.
[1] https://github.com/nix-community/nur-combined/tree/master/re...
As much as i love the feeling of NixOS, i really want something like a Lockfile as seen in Rust (and other languages).
Ie if i could define a `Cargo.toml`, which includes versions of packages or `*` if i don't care - and then it gets built into a `Cargo.lock`, i'd be in heaven. Combine that with a great language backing the distro and i'd switch immediately.
As it stands, I hate nixlang, and while flakes is amazing i still dislike the single primary input approach to NixOS _(ie all the packages bundled together)_.
As an example of why i dislike that, i'm stuck on an old version of NixOS currently because when i tried to update the repo date - lots of packages changed in difficult to manage ways. X was crazy slow, Firefox was being wonky, XFCE was janky, etc. All my flakes.lock told me was that the hash of the repo was different.. yay.. hundreds of dependencies were different i'm sure, but no clue which ones, and no easy way to isolate the problems and just incrementally update.
Luckily flakes allowed me to rollback perfectly. Well, i still had some userland state from the newer applications that i needed to nuke, but i'm ignoring that for now.
Being able to more easily incrementally update specific dependencies would be amazing for me. As it stands i have no clue when or how i'll update my NixOS input version. Which is not a promising sign for my continued usage of NixOS.