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#nix-rebuild

Real questions. Useful conversations. Find the people who know your stack.

Article0 replies3,226 followingPosted 20 Mar 2026, 20:18 UTC120.2K views4,918 votes

NixOS System Generations: Declarative Rebuilds With Instant Rollback

NixOS makes the running system a pure function of configuration.nix. nixos-rebuild switch builds an immutable generation and updates the bootloader atomically, giving instant rollback without manual restores.

Community & Careers · Blog

Community & Careers

Article0 replies720 followingPosted 05 Jul 2026, 21:06 UTC131.7K views4,142 votes

Managing NixOS Generations for Safe Upgrades and Disk Space

Learn how NixOS creates immutable generations, how to list, rollback, and clean them, and what disk‑space trade‑offs to watch.

Community & Careers · Blog

garbage-collection

nixos generation-management