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Cake day: August 2nd, 2026

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  • Silently working around a problem is how you end up with a system no longer set up the way you think it is.

    It’'s not working around the issue, it’s just refusing to update. You shouldn’t need to manually rollback a system that doesn’t boot. And you shouldn’t need to manually troubleshoot or fix it either. Just report the failing update and wait for it to be fixed.

    Jup, I think that explains my point perfectly, thank you!

    The point of most atomic distros is that it’s set up for you. If you want to manually investigate around and work around the issue yourself, then an atomic distro is probably not for you.

    I’d add to this that my distro will just spare you the time to unfuck your system. What you do about the fact that the update failed is still up to you to figure out, but at least you start the figuring out process in your damn DE. That in no way is “silently changing how your system works”, that’s literally just saving you time by doing something that you would have to manually do yourself if it was even a possibility.














  • UPDATE

    I took your suggestions to heart and updated the website to reflect the changes I implemented today. The big change is that I found a way to keep pacman fully intact and functioning, but make it apply the changes atomically. So now this isn’t just limited to Flatpaks, but LITERALLY Arch Linux but made atomic.

    The new intro reads:

    “Plutonium-239 is Arch Linux, made atomic. It combines the rolling release model of Arch Linux with an atomically updated root filesystem inspired by SteamOS on top of the heavily optimized CachyOS performance kernel. Unlike immutable distributions that lock you out of the native package manager and force you into sandboxes, Pu-239 keeps the core Arch experience intact. You still get the full power of pacman and the official Arch repositories, with the peace of mind of an unbreakable safety net underneath.”

    For more information, please check out the updated “How it works” section. Thank you all a lot for the feedback!


  • 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!