[O] LaTeX preamble in a custom exporter

[Marcin Borkowski]

Hi list,

I'm writing an exporter derived from the LaTeX one.  I need to include
a special package in the preamble.  Do I have to override
org-latex-template (which I wouldn't like to do)?  I know about
org-latex-default-packages-alist and org-latex-packages-alist – AFAIU,
I could temporarily (let) them to a value including my package, but this
seems not very elegant.  Any other suggestions?

TIA,

-- 
Marcin Borkowski
http://octd.wmi.amu.edu.pl/en/Marcin_Borkowski
Faculty of Mathematics and Computer Science
Adam Mickiewicz University