Depends on how well sealed it is.
If you want it to last longer than a freezer bag will keep it, which is only 4 months or so, after you put it in plastic, wrap it well in aluminum foil and fold the edges together securely.
That will essentially make it hermetically sealed and reduce the moisture loss through the plastic.
Not sure how long that will last but should be a good long time.
I went ahead and wrapped the store packages in aluminum foil. There was some frost on the inside of the plastic, but the meats still looked red (beef) and pink (chicken), so I doubt lasting harm was done.