title: Turn off automatic induction principle in Coq
body: <p>I have defined a nested inductive data type and have defined a custom inductive principle for it. However, automated tactics from a library I'm using (specifically, DBLib for de Bruijn indices) expects induction is on the usual inductive principle. Since I never intend to use the originally-generated inductive principle, is there any way to either replace the automatically-generated principle? Or, if not, is there a way to temporarily turn off this automatic generation?</p>