Simple script that allows to create and use Systemd extensions with specified packages for Fedora (>=41, dnf5 required), avoiding to deal with Fedora Atomic rpm-ostree layering.

This script relies on Nushell, which can be easly installed with brew:

$ brew install nushell

We will install Docker in an extension as an example.

First we download dnf5-sysext.nu and add execution permissions.

$ git clone https://github.com/Zeglius/dnf5-sysext.sh.git
$ cd dnf5-sysext.sh
$ chmod +x ./dnf5-sysext.nu

Try to execute it to see if is working

./dnf5-sysext.nu --help

We copy docker repo file into /etc/yum.repos.d

$ curl "https://download.docker.com/linux/fedora/docker-ce.repo" | sudo tee /etc/yum.repos.d/docker.repo

And now, we create the systemd extension, and install in it docker-ce packages

$ ./dnf5-sysext.nu install \
    docker-ce \
    docker-ce-cli \
    containerd.io \
    docker-buildx-plugin \
    docker-compose-plugin

Should show a prompt to confirm whenever start the extension.

Afterwards, all left is enabling docker.

$ systemctl enable --now docker

As its experimental state implies, this script can render your PC inoperable. Here is a quick guide to fix it:

1. Boot into grub, press e to edit the kernel parameters, and append systemd.mask=systemd-sysext.service this to the penultimate line, Ctrl + x to boot.

2. Once logged in, remove the contents of /var/lib/extensions/WHATEVER_EXT_NAME, by default being /var/lib/extensions/dnf5_sysext

sudo rm -rf /var/lib/extensions/dnf5_sysext