Install this version:
emerge -a =dev-chicken/srfi13-0.3.8
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-chicken/srfi13-0.3.8
Or alternatively:
emerge --autounmask-write -a =dev-chicken/srfi13-0.3.8
# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
inherit chicken-egg
DESCRIPTION="SRFI-13 string library"
HOMEPAGE="https://wiki.call-cc.org/eggref/6/srfi-13"
LICENSE="BSD"
SLOT="0"
KEYWORDS="~amd64 ~x86"
RDEPEND="
dev-chicken/srfi14
"
DEPEND="${RDEPEND}"