Arm64 with language python always creating amd64 host

arm64 arch with language as python always creating amd64 host. I have content in my travis.yml

language: python
jobs:
include:
- services: docker
python: 3.6
os : linux
arch: arm64
env:
- CIBW_BUILD=“cp36-manylinux_aarch64”
- CIBW_ARCHS=“aarch64”

But it is creating host as amd64 instead of arm64. What to do to check whats the issue

hostname: 8cc8941b-e323-4f37-80e2-4c71c5978633@1.worker-com-7658dbcdc9-tf7v6.gce-production-1