Kubernetes in a vm?

Has anyone gotten the a single node kubernetes (following Kubernetes - NixOS Wiki) working with nixos-rebuild build-vm and result/bin/run-nixos-vm?

I’ve set up a lot of port forwards with QEMU_NET_OPTS but no matter what I do certmgr never starts and nothing ever generates the cluster-admin.pem or cluster-admin-key.pem files:

kube-addon-manager:

Error in configuration: 
* unable to read client-cert /var/lib/kubernetes/secrets/cluster-admin.pem for cluster-admin due to open /var/lib/kubernetes/secrets/cluster-admin.pem: no such file or directory
* unable to read client-key /var/lib/kubernetes/secrets/cluster-admin-key.pem for cluster-admin due to open /var/lib/kubernetes/secrets/cluster-admin-key.pem: no such file or directory

It’s late, here. This is a hip-shot. But maybe it helps as-is (rather than being blocked until someone finds the time):