Have you tried just compiling it with fewer threads? Would almost certainly reduce the RAM usage, and might even make the compile go faster if it you’re needing to swap that heavily

Related note: There are some good vegan eggs out there to give a try!

If you want something that cooks and bakes like eggs there’s stuff you can by like Just Egg

For baking there’s a million things you can use that are pretty cheap. For instance, Aquafaba is the leftover water from cooking chickpeas or the water in the can if you buy it canned. Acts like egg whites and can be used as a binder for baking