-
In MiKTeX, check
Settings → Always
in “You can choose whether missing packages are to be installed automatically (on-the-fly).” -
Adjust Anki’s LaTeX Build Process
- Download Anki add-on: Edit LaTeX build process.
- Adjust build process in Anki (
Tools → Add-ons → select 'Edit LaTeX build process' → Config
).
Check this tutorial for extra details.