sekret [1] filed a deletion request for lpeg [2]: In [extra] we have lua-lpeg, which is exactly the same. Only two AUR packages depend on it and at least one of them (neovim-git) no for much longer.
[1] https://aur.archlinux.org/account/sekret/ [2] https://aur.archlinux.org/pkgbase/lpeg/
