Install this version:
emerge -a =dev-perl/Perl-Critic-Nits-1.0.0
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-perl/Perl-Critic-Nits-1.0.0
Or alternatively:
emerge --autounmask-write -a =dev-perl/Perl-Critic-Nits-1.0.0
# Copyright 1999-2021 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
DIST_AUTHOR=KCOWGILL
DIST_VERSION=v${PV}
inherit perl-module
DESCRIPTION="policies of nits I like to pick"
SLOT="0"
KEYWORDS="~amd64 ~ppc ~x86"
RDEPEND="dev-perl/Perl-Critic
"
BDEPEND="${RDEPEND}
test? ( dev-perl/Readonly )
"