The OpenMW package in Salix still depends on OGRE.
However this dependency is incorrect. Earlier versions of openmw did use ogre but as of the current version (which is the version on slackbuilds.org) it uses openscenegraph instead. OSG was correctly added (upstream actually) but ogre is still being pulled in despite not being listed at SBo leading me to belief it's a leftover from a previous inclusion by salix.
Extra dependency in SBo package openmw
Re: Extra dependency in SBo package openmw
Thanks for the report, but it seems it is OK now, at least in our main server. It was probably a case of your mirror not having synced yet.