lowdown-nix : Markdown translator producing HTML5, roff documents in the ms and man formats ( https://kristaps.bsd.lv/lowdown/ )
mdbook-linkcheck : A backend for 'mdbook' which will check your links for you. ( https://github.com/Michael-F-Bryan/mdbook-linkcheck )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a nix-guix
For Paludis use this rsync : rsync://gentoo.zugaina.org/nix-guix-portage
If you have a problem : ycarus(-at-)zugaina.org