I would like to propose to rename the package on hex.pm to covertool. Very often the name of the package on hex is the same as the application name. This is actually my first encounter where it's different. Also, the current name suggests it's specifically for rebar which it isn't anymore :-).

With mix you usually write your dependency like this: {:covertool, "~> 1.2"}
The current name requires you to specify the app name as well: {:covertool, "~> 1.2", hex: :rebar_covertool}
With rebar I think it's similar, although I don't know if people are used to that.

On hex we can retire a package with the reason renamed and point people to the new package name. That would help people in moving over.

I'd like to know how others feel about this before submitting a PR.