# Github remote theme \`invalid theme folder: \_sass\`

**URL:** <https://talk.jekyllrb.com/t/github-remote-theme-invalid-theme-folder-sass/2739>\
**Category:** Help\
**Created:** [March 20, 2019, 6:12am UTC](https://talk.jekyllrb.com/t/github-remote-theme-invalid-theme-folder-sass/2739 "2019-03-20T06:12:10Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![gtuckerkellogg](https://yyz2.discourse-cdn.com/flex030/user_avatar/talk.jekyllrb.com/gtuckerkellogg/32/1601_2.png) [@gtuckerkellogg](https://talk.jekyllrb.com/u/gtuckerkellogg)\
**Post date:** [March 20, 2019, 6:12am UTC](https://talk.jekyllrb.com/t/github-remote-theme-invalid-theme-folder-sass/2739/1 "2019-03-20T06:12:10Z")

</div>

I’ve been using Jekyll on github-pages for a while to create lessons for classes I teach. I used a theme heavily derived from `carpentries/styles`, and it was working pretty well.

I wanted to move to a remote\_theme, so I created two new repos:

- The theme [https://github.com/GTK-teaching/lesson-theme](https://github.com/GTK-teaching/lesson-theme)
- A template for using it [https://github.com/GTK-teaching/lesson-template](https://github.com/GTK-teaching/lesson-template)

The template _does_ use the remote theme, so that’s good, but when I run `bundle exec jekyll build` or `serve` on my local copy of the template site, I get a message `invalid theme folder: _sass`. This message does not appear when I run the same command on the theme. I’d like to understand what’s going on.

In all honesty, I have no experience with Jekyll or Ruby outside of developing these lessons, and am just diving in.