Handling the movement of a header file between packages

[Adam Mercer]

Hi

In one of the ports I maintain a header has moved from one package
into a new package, this new package is a dependency of the package
that the header moved from. When upgrading port tries to install this
new package but fails to activate as it wants to install this header
file but as it is provided by the older version of the dependent
package this header is already present. Is there a way to handle this
in the Portfile without having to manually uninstall the older version
of the dependent package prior to activation of the new package?

Hope that makes sense.

Cheers

Adam