Install this version:
emerge -a =app-vim/ansiesc-12
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =app-vim/ansiesc-12
Or alternatively:
emerge --autounmask-write -a =app-vim/ansiesc-12
# Copyright 1999-2021 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 EAPI=7 inherit vim-plugin DESCRIPTION="vim plugin: ansi escape sequences concealed, but highlighted as specified" HOMEPAGE="https://www.vim.org/scripts/script.php?script_id=302" LICENSE="public-domain" KEYWORDS="amd64 x86" RDEPEND="app-vim/cecutil" VIM_PLUGIN_HELPFILES="AnsiEsc.txt"
app-vim/cecutil