Post #864920

So you created your favorite product system image, minimized it, tested its systemd-sysupdate over-the-air update capabilities, your CI automatically tests it in sandboxed virtual networks, and you are happy with it. Now your carefully engineered product wants to be deployed to a smaller embedded system without hassle? Maybe even from your Mac? The final piece of the NixOS appliance image blog post series puzzle is here, and we are tackling one of the nastiest challenges in embedded systems and make it look easy: Cross-Compilation. We started with the basics and progressively added advanced capabilities: 🔹 Part 1: Making "self-inflating" NixOS images that automatically resize their filesystems on first boot using systemd-repart 🔹 Part 2: Learn how to use builtin Nix capabilities to minimize images 🔹 Part 3: Implementing robust, atomic auto-updates with systemd-sysupdate 🔹 Part 4: Cross-compiling the image from any platform to any platform If you are building IoT devices or optimized cloud images, you rarely build on the target hardware. You want to build here (e.g., a powerful x86 server or a MacBook) to deploy there (e.g., ARM64 Raspberry Pi, small RISCV board or whatever small system). In this final guide, we provide a scalable Nix Flake architecture designed to handle this elegantly. We move beyond simple cross-compilation hacks and show you how to: ✅ Strictly separate system configuration from build platform metadata. ✅ Automatically generate every combination of build/host platform (the Cartesian product). ✅ Build Linux images effortlessly even from macOS. This is the blueprint for a maintainable, multi-architecture build pipeline. 👉 Read the Article: https://nixcademy.com/posts/cross-compile-nixos-images/ 👉 Get the Code: https://nixcademy.com/posts/cross-compile-nixos-images/ #NixOS #Nix #DevOps #EmbeddedSystems #IoT #CrossCompilation #Linux