How to cross-compile RancherOS from source for arm64/aarch64?

[ericdraken]

Does anyone know how to cross-compile the latest (or any) RancherOS version from source (rancher/os) on amd64 for arm64?

I've been fighting dapper and Dockerfile.dapper and the build scripts and GOARCH=arm64 and QEMU to coax it to build in an emulated arm64 Docker container, Docker-in-Docker, binding docker.sock, copying in aarch64 libraries like libselinux, and so much more. I'm going in circles with static dependencies missing, tests not being built and failing, TOOLCHAIN indirect failures, and on. You have no idea. Are there real instructions out there to compile the arm64 iso, artifacts, and dist assets?

[SneakyZEKE]

Same need.