Install this version:
emerge -a =app-emacs/abs-mode-20260415.813
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =app-emacs/abs-mode-20260415.813
Or alternatively:
emerge --autounmask-write -a =app-emacs/abs-mode-20260415.813
# automatically generated by g-sorcery
# please do not edit this file
EAPI=8
REPO_URI="https://melpa.org/packages/"
SOURCE_TYPE="tar"
REALNAME="abs-mode"
DIGEST_SOURCES="yes"
inherit g-sorcery gs-elpa
DESCRIPTION="Major mode for the modeling language Abs"
HOMEPAGE="https://github.com/abstools/abs-mode"
SRC_URI="${REPO_URI}${REALNAME}-${PV}.${SUFFIX}"
SLOT="0"
KEYWORDS="~amd64 ~x86"
DEPEND="app-emacs/erlang
app-emacs/maude-mode
app-emacs/flymake
app-emacs/yasnippet"
RDEPEND="app-emacs/erlang
app-emacs/maude-mode
app-emacs/flymake
app-emacs/yasnippet"
app-emacs/erlang app-emacs/maude-mode app-emacs/flymake app-emacs/yasnippet
app-emacs/erlang app-emacs/maude-mode app-emacs/flymake app-emacs/yasnippet