Comment 2 for bug 1857019

base may in fact be None.

(1) it probably shouldn't attempt to search for dependencies in the base.

(2) And _get_linker_version_for_base() should probably be updated to use get_build_base() if base is None. But with it being implemented in ProjectOptions instead of Project, we don't quite have that readily available...

I'll discuss with sergiusens and see what he thinks.