ks disk-based registry can't generate prototype

[inc0]

Is this a BUG REPORT or FEATURE REQUEST?:

/kind bug

What happened:

I've tried to use disk-based registry

result:
ERROR no prototype names matched 'kubeflow-core'

What you expected to happen:

Not an error

How to reproduce it (as minimally and precisely as possible):

git clone https://github.com/kubeflow/kubeflow.git /opt/kubeflow
ks init kfl
cd kfl
ks registry add kubeflow /opt/kubeflow/kubeflow
ks pkg install kubeflow/core
ks generate kubeflow-core kubeflow-core

Anything else we need to know?:

Environment:

• ksonnet version (use ks version):
  jsonnet version: v0.10.0
  client-go version: 1.8
• Kubernetes version (use kubectl version):
  Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:55:54Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
  Server Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.5", GitCommit:"f01a2bf98249a4db383560443a59bed0c13575df", GitTreeState:"clean", BuildDate:"2018-03-19T15:50:45Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}

[bryanl]

ksonnet 0.10.0 does not have this regression.