In other distributions, I add additional fonts to groff by copying converted font files into the directories:
/usr/share/groff/current/font/devps
and
/usr/share/groff/current/font/devpdf
I also have to modify the “download” files in each directory to reflect the additional fonts.
If anyone would be willing/able to help, I would really like to know how I can do the aforementioned operations in NixOS.
Thank you.