# Why does the texlive version of (lua-)latex not have the `--aux-directory`switch? [duplicate]

On Windows (MiKTeX), lualatex has a `--aux-directory` switch. On Linux (TeXLive) it does not. Why is that? If it is a downstream patch only present in MiKTeX, why is it not in upstream lualatex?

It seems like the same issue affects pdflatex and other engines

## marked as duplicate by Phelype Oleinik, Milo, Bobyandbob, user36296, Keks DoseAug 9 '18 at 15:01

• your up/downs stream references are a bit confusing in this context, miktex and texlive are not derived from each other so you wouldn't normally say miktex is downstream of texlive. but anyway `aux-directory` is miktex specific, it is mostly covered by the functionality of the `-output-directory` option in texlive, Personally I think either of them is a really bad idea over and over again we see people with broken documents as aux files have been directed to some non standard place and then the user has failed to configure every other program in the tex pipeline to find them. – David Carlisle Jul 1 '18 at 19:56