Hugo QuickStart doesn't generate drafts

I’m trying to follow the quickstart guide, but I can’t seem to get hugo to generate drafts when draft = true is set (which is the default). Here’s the output:

$ hugo server --theme=hugo_theme_robust --buildDrafts Started building sites ... Built site for language en: 0 of 1 draft rendered 0 future content 0 expired content 0 regular pages created 1 other pages created 0 non-page files copied 0 paginator pages created 0 tags created 0 categories created total in 12 ms Watching for changes in /home/test/hugo/bookshelf/{data,content,layouts,static,themes} Serving pages from memory Web Server is available at http://localhost:1313/ (bind address 127.0.0.1) Press Ctrl+C to stop

When I edit content/post/good-to-great.md to set draft = false, I get this (which seems correct):
$ hugo server --theme=hugo_theme_robust --buildDrafts Started building sites ... Built site for language en: 0 draft content 0 future content 0 expired content 1 regular pages created 2 other pages created 0 non-page files copied 2 paginator pages created 0 tags created 0 categories created total in 14 ms Watching for changes in /home/test/hugo/bookshelf/{data,content,layouts,static,themes} Serving pages from memory Web Server is available at http://localhost:1313/ (bind address 127.0.0.1) Press Ctrl+C to stop
So it seems like my hugo is ignoring --buildDrafts. I’ve updated hugo and its dependencies to the latest versions, but the result is the same. Can someone mind telling me what I’ve done wrong or what I should perhaps look out for?