• On https://github.com/jgm/pandoc/releases, you'll see a list of Pandoc releases.

  • Click one of them to see the available files in that release.

  • You can right click a given link to copy its URL to put that into a script. 

  • The gist of the following script (which you can put in your postInstall is to cURL  a modern pandoc release, move the binaries to where they'll be found, and deletes everything else:

#!/usr/bin/env bash
set -e

curl -L  https://github.com/jgm/pandoc/releases/download/ | tar xz
mv ./pandoc- /usr/bin
mv ./pandoc- /usr/bin
rm -rf ./pandoc-
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