I use Pandoc as a static site generator and previous versions of the program allowed me to specify YAML files with metadata about the document like so:
pandoc --defaults ./base.yaml -o ./res/head.html ./res/head.md
However, now when I install it to a new system I get the following as output:
Unknown option --defaults.
The Pandoc user guide still specifies a --defaults option, but pandoc --help does not list the option.