Install this version:
emerge -a =dev-ruby/spider-0.5.4# Copyright 1999-2020 Gentoo Authors # Distributed under the terms of the GNU General Public License v2 EAPI=8 USE_RUBY="ruby32 ruby33" RUBY_FAKEGEM_RECIPE_TEST="rspec3" inherit ruby-fakegem DESCRIPTION="web spidering library" HOMEPAGE="https://github.com/johnnagro/spider" LICENSE="GPL-2" SLOT="0" KEYWORDS="amd64 ~arm64 x86" IUSE="" #does not work, requires webrick/spec which are not in the tree RESTRICT=test