Unbelievably, the ankle zipper tab broke off in my hand:

It’s one of those zippers where the tab releases a lock preventing the zipper from coming unzipped. Mary noped out of removing and replacing the entire zipper.
Trimming a snippet of aluminum miniblind from the Small Box o’ Flat Stuff and two dots of JB Kuikweld epoxy seemed appropriate:

Ugly, but serviceable:

The stray epoxy scraped off under fingernail pressure over the next two days and the pants are ready for the next snowfall.
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