>>>>> Paul Eggert <eggert@cs.ucla.edu> writes:

> Instead, I suggest making it a configure-time option, e.g.,
>   ./configure --enable-deterministic-build

I'd prefer a configuration options too.

> I suppose Emacs code could also set the new Elisp deterministic-build
> variable that you're suggesting, to override the configure-time default. But
> not an environment variable, please.

+1