I'm on Arch (where I don't get the Hyperdoc cannot load font message), not Debian, and I don't really know anything about fonts, but here are some wild guesses:
xfonts-traditional xfonts-terminus fonts-terminus-otb xfonts-100dpi xfonts-75dpi xfonts-base -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/fricas-devel/CAL%2BbK4MmMDrWE1W8vXP%2BKw9BfKEPxx5fuyLYt6UEZQB9JdYU2Q%40mail.gmail.com.
