I'm a *BSD guy, myself, but in the 'ports' system there's a dir called 'work' which is usually the {$BUILDDIR} in the makefile, and inside that dir will be a "name-version.x.x" folder with an entire build/install tree under it. In there are such things as to which that message referred...
The only time I've seen anything like it is when trying to load a DSO into Apache that was configured for the wrong server, such as a mod_php built for compatibility with mod_ssl trying to load into a non-SSL aware apache....
Glad to hear it's working 🙂