You will need a cross toolchain targeting i386-linux-musl on PATH. https://github.com/richfelker/musl-cross-make is a tool that can build one for you with minimal hassle. Set TARGET to i386-linux-musl. Build the prequisites (Linux and Busybox) by running J=xxx script/build-prereq, replacing xxx with the desired build parallelism. You will need a hard drive image hdd.base.img with an installed copy

