Revert "ok, yum only now"

This reverts commit b514ce8b3a18831ca1790afdc24a3802c06f38bb.
Revert "synthax fix"

This reverts commit 1c6e49b61a762a924c01cd72bdba2958c5f75d37.
Revert "allowing package downgrade"

This reverts commit 4aab9516308d4f19b9756a1c7d8138c96d3aeae7.