Check package environment on local mod data loading
Check package environment on local mod data loading

This is needed since both Windows and Linux packages could be installed
at the same time when the user uses the same directory on multiple
platforms.

MjnMixael/knossos,MjnMixael/knossos,MjnMixael/knossos,MjnMixael/knossos,MjnMixael/knossos