dafny : Verification-aware programming language ( https://dafny-lang.github.io/dafny/ )
fstar : Verification system for effectful programs ( https://www.fstar-lang.org )
hy : A LISP dialect running in python ( http://hylang.org/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a src_prepare-overlay
For Paludis use this rsync : rsync://gentoo.zugaina.org/src_prepare-overlay-portage
If you have a problem : ycarus(-at-)zugaina.org