Sorry, I figured if a user wanted an uptade for 42.3 he would've already manifested his interestand and since this update won't go into 43.2 release repo...

%make_jobs is not 'deprecated' :/ it can handle both make and ninja. If by any chance you need to move to ninja you'd need only to do one change instead of two. But of course it's not such a dramatic difference and we can use %make(ninja)_build easily.