Here's an idea, boil the water in a pan instead ... or, do you have something other than coffee granuals? We just boil the kettle and pour water on top of the coffee granuals but I think there is another way with some sort of coffee tab,, thing...

lol, deserpate measure eh, using flavoured water to make coffee, I guess you need your coffee fix! I do understand, though. You may as well give it a try, if coffee doesn't hurt the machine I doubt flavoured water would. (don't quote me on that though!)