Yeh, immutable distros... You can install software, it's just you have to declaratively define what software you want, then apply that as a patch.
You don't just apt install cowsay, you have to create a file that defines the installation of cowsay.
This way, if you have to change how cowsay is installed, you tweak that patch file and reapply it.
If you have to wipe & reinstall (or get a new computer or whatever) you just apply all your patches, and the system is the same again.

[–] [email protected] 3 points 6 months ago (1 children)

You're talking about declarative systems like Nix. Immutable just means that the root filesystem is read-only. You can install programs as Flatpaks or inside a container (toolbox on Silverblue).

[–] towerful 2 points 6 months ago

Oh, no kidding.
I always thought immutable required the declarative installs.
I guess, immutable is more "containerised userland"?