cover doesn't seem to work for me

[erikyuzwa]

Hey all, hopefully this is just a misunderstanding of the syntax to the tool. So far, I really really love gimli and this would just be a "nice to have" working.

I'm trying to use gimli -f resume.md --cover cover_letter.md -o dist

gem list displays gimli (0.5.9)

And it's only displaying the help instead, giving me the message unknown option --cover.
Any ideas? Thanks in advance.