`-d, --dir` option seems to be not working

[schu]

sudo -E ./kube-spawn create -d ./kube-spawn-data -c my-cluster
...
sudo -E ./kube-spawn start -d ./kube-spawn-data -c my-cluster
...
waiting for machine "kubespawnmy-cluster1" to start up
waiting for machine "kubespawnmy-cluster0" to start up
failed to start machine: timeout waiting for "kubespawnmy-cluster0" to start
failed to start machine: timeout waiting for "kubespawnmy-cluster1" to start
not all machines started