What is "shackly"

Usage examples of "shackly".

It stood in some tall yellow grass by the banks of a dried-out arroyo, a deserted street of shackly buildings, corrals rotted by the weather, porches grown over with weeds.

I couldn't sleep, and so I come along up-street 'bout midnight, a-turning it all over, and when I got to that old shackly brick store by the Temperance Tavern, I backed up agin the wall to have another think.