Compiler error with -cp

[JbIPS]

I'm trying to set up vaxe for my project with this hierarchy:

myproject
-- src
  -- hx
     -- company
        -- Main.hx
build.hxml

In my build.hxml, I've set a -cp:

-main company.Main
-cp src/hx

When I ask for completion, I get

Compiler error: Invalid commandline class: src.hx.company.Main should be company.Main

So I'm wondering if -cp is taken into account or is there an error in my conf?
Thanks