In my experience neither weasels, stoats, ferrets or mink are particularly attracted to decaying flesh, all having extemely sensitive noses.
If the roadlkill was sufficiently fresh, then it is likely that some might be taken by these mustelids, particularly so whilst providing for a litter of young.
As aeshna5 has pointed out, these predators do tend to cache food, but having witnessed this practise in a rehabilitation setting, I can confirm that they never return to it, if a fresher supply of food should be presented.
From that I would conclude that dried/non-fresh/rotting meat is not too high on their favourite menus list.
I should add that we never feed roadkill to any animal in our care ... the risk of passing infection is too great to be considered practical.