For questions on using the Pi-Gen tool to build Raspberry Pi OS images.
Pi-Gen is the tool used to build the official Raspberry Pi OS images available for download from the Raspberry Pi homepage. It provides a script-driven and heavily customizable build environment to assemble an OS image that can be directly written to the Pi's (Micro)SD card and therefore enables users to create their own tailored Pi OS installations in a reproducible way.
Use this tag if you are creating your own Pi OS image with Pi-Gen and find that the build process fails due to reasons inherent in the Pi-Gen or the build configuration, or the resulting image contains errors likely attibutable to the Pi-Gen build process.