Is it possible to run "kubeadm init" without Internet access?

When executing kubeadm init on isolated networks where the host is not allowed to make external connections, it fails on download of a stable version check of some sort, as it tries to retrieve https://storage.googleapis.com/kubernetes-release/release/stable-1.6.txt .

# kubeadm init
[kubeadm] WARNING: kubeadm is in beta, please do not use it for production clusters.
unable to get URL "https://storage.googleapis.com/kubernetesrelease/release/stable-1.6.txt": Get https://storage.googleapis.com/kubernetes-release/release/stable-1.6.txt: dial tcp 216.58.204.80:443: i/o timeout

Why is this check needed? The contents of that URL seems to today be "v1.6.4", which is the version that is installed:

# kubeadm version
kubeadm version: version.Info{Major:"1", Minor:"6", GitVersion:"v1.6.4", GitCommit:"d6f433224538d4f9ca2f7ae19b252e6fcb66a3ae", GitTreeState:"clean", BuildDate:"2017-05-19T18:33:17Z", GoVersion:"go1.7.5", Compiler:"gc", Platform:"linux/amd64"}

This seems to be a behavior introduced after 1.6.0. I have looked at documentation, flags, configuration options but have not found a way to execute kubeadm init without this (not even with --skip-preflight-checks).