Author here. It definitely builds outside docker. It's a musl-cross-make toolchain, you can procure the dependencies locally if you don't like the Docker recip

Author here. It definitely builds outside docker. It's a musl-cross-make toolchain, you can procure the dependencies locally if you don't like the Docker recipes. Feel free to open an issue if you feel like that's a challenge. Likely, you can get it to work but checksum reproducibility will be hard without a controlled environment like docker.