Install this version:
emerge -a =dev-perl/Event-ExecFlow-0.640.0
# Copyright 1999-2025 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
DIST_AUTHOR=JRED
DIST_VERSION=0.64
inherit perl-module
DESCRIPTION="High level API for event-based execution flow control"
LICENSE="|| ( Artistic GPL-1+ ) LGPL-2.1+"
SLOT="0"
KEYWORDS="amd64 ppc ppc64 ~sparc x86"
RDEPEND="
>=dev-perl/AnyEvent-0.400.0
dev-perl/libintl-perl
"
BDEPEND="${RDEPEND}"
>=dev-perl/AnyEvent-0.400.0 dev-perl/libintl-perl
>=dev-perl/AnyEvent-0.400.0 dev-perl/libintl-perl