A compiler is frequently described as mature if you don't need any other language compiler to compile it - e.g. C is a mature language; you can use a compiler written in C to compile other programs written in C.
Is there a term for - not just the -opposite-, but a way to describe when you want to -preclude- a tool from being used as part of its own toolchain?
An analogy by physical artifact would be a lathe build that includes no components produced by a lathe.
Important to the concept I'm trying to describe is the fact that you could, easily, use the item in question to make more of those items in question, but you are deliberately -not- doing so.
@robryk
Yes. The tool being described cannot appear at all in the entire structure required to create it.
e.g. a C compiler written in Lisp, or a lathe produced with castings (so, no machined or lathed parts) only.