bashbrew-arch   variants
amd64    jessie,jessie-slim,alpine,stretch,stretch-slim,buster,buster-slim
arm32v6  alpine
arm32v7  jessie,jessie-slim,alpine,stretch,stretch-slim,buster,buster-slim
arm64v8  alpine,stretch,stretch-slim,buster,buster-slim
i386     alpine
ppc64le  alpine,stretch,stretch-slim,buster,buster-slim
s390x    alpine,stretch,stretch-slim,buster,buster-slim