Newer pandoc does not have `--filter pandoc-citeproc` but rather `--citeproc`
docgen uses Pandoc's Citeproc support without optionality to disable it. This means that it fails to run on newer versions of Pandoc, with an error which pandoc lists as a deprecation warning that
--filter pandoc-citeproc should be spelled
--citeproc these days.
Reproduction version etc.
main (or any version really)
Details of environment
- OS details: NixOS 21.05
- Dependency Packages: Pandoc beyond about 2.10