What is gitbook build --format=ebook supposed to do?

[bclinkinbeard]

gitbook pdf . ebook.pdf, gitbook epub . ebook.epub, and gitbook mobi . ebook.mobi all work, so I don't think it's a config issue.

gitbook build . ./out --format=ebook just creates an out directory with HTML and stuff in it though. Unless I have already generated the ebook formats, in which case it copies those files into out.

I was under the impression that gitbook build . ./out --format=ebook should create all 3 formats from scratch and put them in the out directory. Is that not the case?

❯ gitbook -V
CLI version: 2.3.0
GitBook version: 3.2.2