Thread:Project:Support desk/$wgForeignFileRepos and relative image URLs

I'm using interwiki transclusion with a bunch of content on a remote wiki. Linking to content on that wiki works fine, as does transcluding articles or manually embedding images. However, the transcluded articles all use relative paths for the images, so they don't show up on my wiki. I've looked around a bit and have not seen a clear way to address this.

Is there a setting I need to change, or is there a known hack or patch that I could add to my MW installation to resolve this issue? I'm only transcluding images from one wiki, so I can hard code something if necessary.