Exporting org files with accents in filename to pdf using tectonic on Windows

[Alexis Praga]

Hi,

On Windows, I'm having trouble to make miktex work so I would like to use 
tectonic as the default latex engine. Setting
   (setq org-latex-pdf-process '("tectonic  --outdir=%o  %f"))

works when the filename does not contains accents. When it does, for example an 
"e acute", it fails with 
   error: failed to open input file 
"20260127T171225--résultats-article__test_todo.tex"

ox-pandoc has a similar issue:
   pandoc.exe: 
c:/Users/USER/org/notes/20260127T171225--rsultats-article__test_todo.tmpIt9pEt.org:
 withBinaryFile: does not exist (No such file or directory)

Setting (prefer-coding-system 'utf-8) does not help. Emacs version is GNU Emacs 
30.2 (build 2, x86_64-w64-mingw32) of 2025-08-14.

Thanks for the help !

Alexis