On Wed, 2 Jul 2014, Brett Viren wrote:

> To add, if deterministic builds were not possible it would mean this
> could not exist:
> 
>   http://nixos.org/nix/

or that this website makes assertions not accurate

There are timestamps and build IDs and more which, unless 
tinkered with, will mean that building ANY package at two 
different times will have (non-functional) differences that 
prevent an exact binary duplicate from ever existing.  
Similarly, with parallel threaded (-j N) build systems, a 
Makefile might comclude one time that sub-element FOO was done 
first, otehr times sub-element BAR, and so to traverse a build 
path in differing orders.  Not anything invidious, but not 
'identical' either

-- Russ herrold