Sixos: A NixOS-Based Operating System Without Systemd

The Sixos project presents an intriguing take on NixOS, stripping away systemd in favor of a simpler, more transparent init system. This talk, presented at CCC and available on media.ccc.de via YouTube, delves into the motivations behind Sixos, its architecture, and the challenges of maintaining a Nix-based system without systemd dependencies.

The presentation effectively outlines the bloat and complexity that systemd introduces, especially in environments that prioritize minimalism and composability. The speaker highlights how Sixos leverages the declarative and reproducible nature of Nix while adopting a more traditional Unix philosophy for process management.

For those already familiar with NixOS, the discussion on Sixos’ implementation details—such as alternative service supervision and compatibility with existing Nix tooling—is particularly insightful. However, the project is still in its early stages, with some rough edges in dependency handling and ecosystem support.

Overall, Sixos is a compelling experiment for users who appreciate Nix’s power but prefer a leaner, more modular system. Whether it will gain traction beyond niche enthusiasts remains to be seen, but it's a welcome addition to the growing landscape of alternative Linux distributions.