Github user AhyoungRyu commented on the issue:
https://github.com/apache/zeppelin/pull/1577
@yoonjs2 Yeah you're right, there is a typo. It should be one of them
either `zeppelin-website` or `zeppelin_website`. I updated the comment :)
And you did like below as you said
```
$ JEKYLL_ENV=production
$ bundle exec jekyll build
```
But it should be in one line
```
$ JEKYLL_ENV=production bundle exec jekyll build
```
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