Fedora : Fedora SilverBlue 44 and distrobox tool.

Distrobox on Fedora is a lightweight, rootless way to run any Linux distribution inside a tightly‑integrated container, powered by Podman. It’s more flexible than Fedora’s native Toolbox because it can pull any OCI image (Ubuntu, Arch, Debian, openSUSE, Alpine, etc.)

What Distrobox Does on Fedora

• Runs any distro inside your terminal using Podman or Docker.
• Integrates with the host: shared $HOME, USB devices, audio, GUI apps (X11/Wayland).
• No root needed — perfect for immutable Fedora variants like Silverblue/Kinoite.
• Exports apps from the container back to Fedora using distrobox-export.

Install Distrobox on Silverblue

rpm-ostree install distrobox
systemctl reboot

Create and enter a Gentoo container

distrobox create -i gentoo/stage3:latest -n gentoo
distrobox enter gentoo

Sync and update Gentoo

emerge --sync
emerge --ask --update --deep --newuse @world
...

Gentoo inside Distrobox is source‑based, this means:

Compiling packages happens inside the container

CPU and RAM usage will be high

Builds may take a long time (depending on your hardware)

Silverblue’s immutability does not affect Gentoo’s compilation.