I don't think ``realpath`` is necessary. Even if we stick to relative paths, the result should be correct. For example, for the package tests, the first path would be ``../../lib/3.6/packages.cf``, which in turn would have ``$(sys.local_libdir)/common.cf`` expand to ``../../lib/3.6/common.cf``, since that is where the ``packages.cf`` was found. Or am I missing something?