I do, yes. I’d love to use it, because I like Scheme a whole lot more than Nix (I hate Nix, the language), but Guix suffers from a few shortcomings that make it unsuitable for my needs:

• There’s no systemd. This is a deal breaker, because I built plenty of stuff on top of systemd, and have no desire to switch to anything else, unless it supports all the things I use systemd for (Shepherd does not).
• There’s a lot less packages, and what they have, are usually more out of date than on nixpkgs.
• Being a GNU project, using non-free software is a tad awkward (I can live with this, there isn’t much non-free software I use, and the few I do, I can take care of myself).
• Last time I checked, they used an e-mail based patch workflow, and that’s not something I’m willing to deal with. Not a big deal, because I don’t need to be able to contribute - but it would be nice if I could, if I wanted to. (I don’t contribute to nixpkgs either, but due to political reasons, not technical ones - Guix would be the opposite). If they move to Codeberg, or their own forge, this will be a solved issue, though.

Before I switched from Debian to NixOS, I experimented with Guix for a good few months, and ultimately decided to go with NixOS instead, despite not liking Nix. Guix’s shortcomings were just too severe for my use cases.

NixOS, because:

• I can have my entire system be declaratively configured, and not as a yaml soup bolted onto a random distro.
• I can trivially separate the OS, and the data (thanks, impermanence)
• it has a buttload of packages and integration modules
• it is mostly reproducible

All of these combined means my backups are simple (just snapshot /persist, with a few dirs excluded, and restic them to N places) and reliable. The systems all have that newly installed feel, because there is zero cruft accumulating.

And with the declarative config being tangled out from a literate Org Roam garden, I have tremendous, and up to date documentation too. Declarative config + literate programmung work really well together, amg give me immense power.

NixOS.

It is good for everything, if you invest a little time^[1] into it.

Considering the amount of CVEs the kernel puts out, I’d argue there’s plenty there that’s broken, and could be fixed by implementing them in a language less broken than C.

I’d say “under no circumstances”. When building for production, you want to build on a stable foundation. LFS isn’t that, it’s an educational tool. It does not result in a maintainable, robust system. It requires tremendous amounts of work to keep it secure and updated: there’s no package manager, no repository you can pull from, no nothing. You have to build an entire distribution on your own. Outside of educational purposes, I’m having trouble to imagine any situation where that might be a good idea.

No, not even embedded. There were always distros targetting embedded systems, LFS was never a good choice there either. It was much more straightforward to strip down - say - Debian for a limited device, than to build something from scratch for it. (I spent a few years building and operating embedded Linux systems at the early 2000s, we built it on a stripped down Debian.)

I have Emacs, and I have my NixOS configuration. That’s all the GUI system configuration I need.

So instead of commenting inside of nix files, you put nix files into .org documents and collate them so you can make your nix files an OS and a website and a zettelkasten-looking set of linked annotated nodes.

Yup! And writing it in Org allows me to structure the configuration any way I like. It makes it a whole lot easier to group things that belong together close to each other, and I never have to fight the Nix language to do so. I can also generate easily browsable, rich documentation that explains what’s what and why, which helps me tremendously, because a year after I installed and configured something, I will not remember how and why I did it that way, so my own documentation will help me remember.

Generating code from docs (rather than the other way around) also means that I’m much more likely to document things, because the documentation part is the more important part. It… kinda forces a different mindset on me. And, like I said, this allows me to structure the configuration in a way that makes sense to me, and I am not constrained by the limitations of the Nix language. I can skip a tremendous amount of boilerplate this way, because I don’t need to use NixOS modules, repeating the same wrapping for each and every one of them. Also feels way more natural, to be honest.

You have home on tmpfs. Isn’t that volatile? Where do you put your data/pictures/random git projects? Build outputs? How’s your RAM? (Sorry if I’m missing something obv)

It is volatile, yes, in the sense that if I reboot, it’s lost. I am using Impermanence, for both /home and /. The idea here is that anything worth saving, will be recorded in the configuration, and will be stored on a persistent location, and will get bind mounted or symlinked. So data, pictures, source code, etc, live on an SSD, and they get symlinked into my home. For example, the various XDG userdirs (~/Downloads, etc), I configured them to live under ~/data, and that dir lives on persistent storage and gets symlinked back.

My root and /home are both set to 128Mb, intentionally small, so that if anything starts putting random stuff there, it will run out of space very fast, and start crashing and complaining loudly, and I’ll know that I need to take care of it: either by moving the data to persistent storage, or asking whatever is putting stuff there to stop doing that. My /tmp (where temporary builds end up) is 2Gb, and sometimes I need to remount it at 10gb (hi nerdfonts!), but most of the time, 2g is more than enough.

I have 32Gb RAM, but only ~2.5g is used for tmpfs purposes (2g of it on /tmp itself), and most of the time, the majority of that is unused and as such, available for other things. My wife’s laptop with 16Gb RAM uses a similar setup, with 512mb for /tmp, and that works just as fine.

I do have 64Gb of swap on a dedicated SSD, though, and that helps a lot. I currently have 3GB ram free, and 37G of swap used, but don’t feel any issues with responsiveness. I don’t even know what’s using my swap! Everything feels snappy and responsive enough.

What’s your bootup like?

A few seconds from poweron to logging in. By far the slowest part of it is the computer waiting for me to enter my password.

❯ systemd-analyze
Startup finished in 8.667s (kernel) + 29.308s (userspace) = 37.975s
graphical.target reached after 29.307s in userspace.

Looking at systemd-analyze blame and systemd-analyze critical-path, most of that userspace time is due to waiting for the network to come online (18s), and for docker to start up (7s). Most of that is done parallel, though. Boot to gdm is waaay faster than that.

Another commenter mentioned difficulties in setting up specialized tools w/o containerizing, and another mentioned that containers still have issues. Have you run into a sitch where you needed to workaround such a problem? (e.g. something in wine, or something that needs FHS-wrangling)

I haven’t run into any issues with containers, and I’m using a handful of them. docker, podman, flatpak all work fine out of the box (after setting up permanent storage for their data, so they don’t try to pull 10gb containers into my 128mb root filesystem :D). Wine… I’m using Wine via Lutris to play Diablo IV, and it has worked without issues so far out of the box, I didn’t have to fight to make it work.

I did run into a few problems with some stuff. AppImages for example require running them with appimage-run, but you can easily set up binfmt_misc to automatically do that for you, so you can continue your curl https://example.com/dl/Example.AppImage -o Example.AppImage && chmod +x Example.AppImage && ./Example.AppImage practices after that.

There’s also cases where downloaded binaries don’t work out of the box, because they can’t find the dynamic linker. I… usually don’t download random third party binaries, so I don’t often run into this problem. The one case where I did, is Arduino tooling. I have a handy script in my (arduino-powered) keyboard firmware to patch those with patchelf. But if need be, there’s buildFHSEnv, which allows us to build a derivation that simulates an FHS environment for the software being packaged. So far, I did not need to resort to that. Come to think of it… using buildFHSEnv would likely be simpler for my keyboard firmware than the patching. I might play with that next time I’m touching that repo.

I’ve been daily driving NixOS for about a year now, switched from over two decades of running Debian. I’ll try to answer your questions from my perspective:

How much can I grok in a week?

If you have some experience with functional programming or declarative configs (think Ansible), then it’s a lot easier. You can definitely learn enough in a week to get started. One year in, my Nix knowledge is very light still, and I get by fine. On the other hand, there’s a lot of Nix I simply don’t use. I don’t write reusable Nix modules, and my NixOS configuration isn’t split into small, well manageable files. It’s a single 3k lines long, 130k sized flake.nix. Mind you, it’s not complete chaos: it is generated from an Org Roam document (literate programming style; my Org Roam files are 1.2mb in size, clocking in at a bit below 10k lines).

With that said, it took me about a month of playing and experimenting with NixOS in a VM casually, a couple of hours a week, to get comfortable and commit to switching. It’s a lot easier once you switched, though.

How quick is it to make a derivation?

For most things, a couple of minutes tops. I found it easier to create derivations than creating Debian packages, and I was a Debian Developer for two decades, had a lot more and lot deeper understanding of Debian packaging practices. It’s not trivial, but it’s also not hard. The first derivation is maybe a bit intimidating, but the 10th is just routine.

Regarding make install & co, you can continue doing that. I use project-specific custom flakes and direnv to easily set up a development environment. That makes development very easy. For installing stuff… I’d still recommend derivations. A simple ./configure && make && make install is usually very easy to write a derivation for. And nixpkgs is huge, chances are, someone already wrote one.

How quick is it to install something new and random?

With a bit of self control and liberal use of direnv & flakes, near instant.

How long do you research a new package for?

https://search.nixos.org/packages, you can search for a package, and you can explore its derivation. The same page also provides search for NixOS options, so you can explore available NixOS modules to help you configure a package.

Can you set up dev environments quickly or do you need to write a ton of configs?

Very easy, with a tiny amount of practice. Liberal use of flakes & direnv, and you’re good to go. I can’t comment much on Python, because I don’t do much Python nowadays, but JavaScript, Go, Rust, C, C++ have been very easy to build dev environments for.

What maintenance ouchies do you run into? How long to rectify?

None so far. If it builds, it usually works. I do need to read release notes for packages I upgrades, but that’s also reasonably easy, because I can simply “diff” the package version between my running system, and the configuration I just built: I can see which packages were upgraded, and can look up their release notes if need be. In short, about the same effort as upgrading Debian was (where I also rarely ran into upgrade/maintenance gotchas).

Do I need to finagle on my own to have /boot encrypted?

If you use the NixOS installer, then yeah, you do have to fiddle with that a bit more than one would like. If you install via other means (eg, build your own flake and use something like nixos-anywhere to install it), then it’s pretty easy and well supported and documented.

Feel free to ask further question, I’m happy to elaborate on my experience so far.

Meson and CMake are the two major players I’ve seen along autotools. Are they better? In some respects, yes (especially Meson, imo), in others… not really. For a pet project that only targets two platforms, I’d just stick to handwritten worst-practices Makefile. You will likely have less trouble with that than any of the others, simply because you know it already.

I think the first thing to figure out would be why udev is getting shut down. Perhaps you could extract its logs? journalctl -b -u systemd-udevd.service should do the trick. This gets you the logs of the current boot’s udevd service.

Once you know why it is shutting down, it will be time to figure out how to stop it from shutting down. That should, hopefully, fix the problem you’re having.

My parents moved to Linux on their own accord: Dad just wanted something that stays the same, and doesn’t try to exploit him, so he’s been a happy Debian & XFCE user for about a decade now; Mom never used Windows, so she’s happy with Debian & GNOME I was a Debian user (and developer) back when they switched to Linux, and Debian is where they stayed. Dad’s in IT, so he can manage both systems fine, most of the time. I need to unfuck it from time to time, when Dad decides it is a good idea to try and install the latest LibreOffice Ubuntu arm64 .deb package on his x86_64 Debian oldstable, throwing whatever --force flags at dpkg he can find, but other than that, they have everything they need, are happy with their choices, and need very little support from me.

In my own household, Linux is the only system to begin with (apart from a handful of Android phones we all hate, and an XBox, which is slowly getting replaced by a Linux mini PC). I’ve been a Linux user since late 1996, and I purposefully only bought hardware that works decently with Linux, so setting up scanners, printers and the like are a breeze.

Wife saw my setup, how I operate it mostly with the keyboard (she hates the mouse more than I do!), wanted the same, so I built her something similar (NixOS + Wayland + niri + firefox + geary). She never had her own computer before, but did use Windows at work from time to time. She didn’t want to use it on her laptop, though. She wanted something tailor built for her, for her very reluctant computer-usage. So Linux it is! She doesn’t hate it, which is the best I can accomplish with anything computer-related when it comes to her. I’m maintaining her laptop, but that too, requires little work. I just update it from time to time. She’s loving that she can send a print job from her laptop, from the living room, to the printer in my work room.

Kids played with both the xbox, and the gaming mini pc I built, and much prefer the latter, because it is easier to navigate, it is faster (using cheaper hardware), it is more stable, so when they’re old enough to get their own computers, they want Linux too, and I shall abide. Luckily, while schools around here are rather windows-oriented, they have to accommodate Linux users too, so the kids will be more than fine with their Linux computers, even for school tasks. Whether they’ll end up maintaining their computers or not remains to be seen. If they want to, I’ll teach them how to.