haskell-mode : Mode for editing (and running) Haskell programs in Emacs ( https://haskell.github.io/haskell-mode )
idris-mode : Idris syntax highlighting and (eventually) other things for emacs ( https://github.com/idris-hackers/idris-mode )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a haskell
For Paludis use this rsync : rsync://gentoo.zugaina.org/haskell-portage
If you have a problem : ycarus(-at-)zugaina.org