As personal note, it's a pity that we will have luatex/Debian != luatex/TeXLive,
It is just support for the env var that is different. Not much of a pain. And to be honest, I am 99% sure that you will come up with again a different solution/approach, and I will still need to put in the Debian patches ;-) This env var will anyway not used by anyone but those who want to give tests on reproducability. I see not reasonable chance that a user will tinker around with the env var.
given that we try to be OS aware as much as possible.
??? What do you mean with "OS aware" here? "unaware"? I don't see the relation to Debian and/or TeX Live. Norbert ------------------------------------------------------------------------ PREINING, Norbert http://www.preining.info JAIST, Japan TeX Live & Debian Developer GPG: 0x860CDC13 fp: F7D8 A928 26E3 16A1 9FA0 ACF0 6CAC A448 860C DC13 ------------------------------------------------------------------------