[bug#54304] [PATCH] Don't fix git executable location during Elixir build

[Cees de Groot]

> Propagation is not necessary to ‘keep git around’ (assuming that the

Well.... the whole reason that I stumbled upon this was that the compile-time 
substitution referred to a Git version that got GC'd. And I think that that is 
the different between regular inputs and propagated inputs, whether inputs 
become eligible for GC at run-time or not. If I'm misunderstanding something 
there, something else caused that version of Git to get GC'd and I'd be more 
than happy to be corrected in my assumptions.