The Ebook options should be active just if we have the dependencies installed and the epub export buttom activate.
You could submit a pull request for this.
That wasn’t a pull request, that was an issue. Can your developer look at how we disable theme options when PDF dependencies are missing, fork Pressbooks, write a patch and submit a pull request? https://help.github.com/articles/about-pull-requests/
ups. ok. we will do tomorrow.