Install this version:
emerge -a =app-emacs/ox-leanpub-20260506.759
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =app-emacs/ox-leanpub-20260506.759
Or alternatively:
emerge --autounmask-write -a =app-emacs/ox-leanpub-20260506.759
# automatically generated by g-sorcery
# please do not edit this file
EAPI=8
REPO_URI="https://melpa.org/packages/"
SOURCE_TYPE="tar"
REALNAME="ox-leanpub"
DIGEST_SOURCES="yes"
inherit g-sorcery gs-elpa
DESCRIPTION="Export Org documents to Leanpub book format"
HOMEPAGE="https://gitlab.com/zzamboni/ox-leanpub"
SRC_URI="${REPO_URI}${REALNAME}-${PV}.${SUFFIX}"
SLOT="0"
KEYWORDS="~amd64 ~x86"
DEPEND="app-emacs/org-mode
app-emacs/ox-gfm
app-emacs/s"
RDEPEND="app-emacs/org-mode
app-emacs/ox-gfm
app-emacs/s"
app-emacs/org-mode app-emacs/ox-gfm app-emacs/s
app-emacs/org-mode app-emacs/ox-gfm app-emacs/s