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this post was submitted on 04 Sep 2026
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This is very cool! I like the idea of atomic distros although I haven't really gotten into them much, if you keep on working on this project I might join it.
Question: I'm a bit confused about the package management system you talked about. Flatpaks for user level packages? What about the official arch repo and the AUR? I know other atomic distro's don't really work with traditional package managers, what does this mean for Pu-239? If there's no AUR then there is no Arch Linux at least for me.
Also that name could probably do with some work lol. Maybe work on a shorthand way of spelling it and a better way to pronounce it? I'm not sure.
Thank you a lot for your interest! So as I pointed out in the other comments, out of the box and for the 0.0.1 release it's intended to keep the system itself atomically updated through pacman and the user is advised to use flatpaks to install his applications. This is the most user friendly way of going about it, however I'm absolutely on your side and wouldn't use it that way myself. 0.0.2 will have a way to "unlock" it so you can use the distro like vanilla Arch BUT you get peace of mind from knowing that you have a failsafe way of knowing the system will not break.
For the name, I did want Arch-Atomic at first but noticed this would violate the Arch Linux trademark policy and just went with my favorite isotope as a placeholder that unfortunately grew onto me. I will get off the couch now and edit the website so it's apparent that Pu-239 is just the shorthand and people will refer to it as Plutonium-239 or just plain Plutonium in the future!
Thanks that does alleviate my concerns, I do like the name Plutonium or Plutonium-os.
Check out the comment I just left, I implemented a solution that pacman is now completely usable so it's literally just vanilla Arch but atomic instead of being Flatpak-only!
This is awesome, thanks!