pkg.depends_on ignores overrides.rb

[hwiedPro]

When defining a package in the *.autobuild file of a package set it is possible to define dependencies by using:

cmake_package "some/package" do |pkg|
  pkg.depends_on "DEPENDENCY"
end

It is also possible to override os dependencies using source packages by adding the following to the overrides.rb of the package_set.

if (Autoproj.workspace.operating_system[1] & [''18.04', '18.10']).any?
  Autoproj.add_osdeps_overrides 'DEPENDENCY', :package => 'external/DEPENDENCY', :force => true
end

My expectation would be that pkg.depends_on behaves as if the package would have DEPEDENCY set in the packages manifest by:

<depend package="DEPENDENCY" />

This includes that the override would apply for both, the dependencies in the manifest and the depends_on dependency.

It seem that this is not the case:
When using pkg.depends_on "DEPENDENCY" the override is not applied which leads to an installation of the os dependency anyways. But when listed in the same way via manifest.xml it works.