Install this version:
emerge -a =dev-haskell/semirings-0.6
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-haskell/semirings-0.6
Or alternatively:
emerge --autounmask-write -a =dev-haskell/semirings-0.6
# Copyright 1999-2023 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
# ebuild generated by hackport 0.8.4.0.9999
#hackport: flags: +containers,+unordered-containers
CABAL_HACKAGE_REVISION=1
CABAL_FEATURES="lib profile haddock hoogle hscolour"
inherit haskell-cabal
DESCRIPTION="two monoids as one, in holy haskimony"
HOMEPAGE="https://github.com/chessai/semirings"
LICENSE="BSD"
SLOT="0/${PV}"
KEYWORDS="~amd64 ~arm64 ~ppc64 ~riscv ~x86"
RDEPEND="
dev-haskell/base-compat-batteries:=[profile?]
>=dev-haskell/hashable-1.1:=[profile?] <dev-haskell/hashable-1.5
=dev-haskell/unordered-containers-0.2*:=[profile?]
>=dev-lang/ghc-8.10.6:=
"
DEPEND="
${RDEPEND}
>=dev-haskell/cabal-3.2.1.0
"
src_configure() {
haskell-cabal_src_configure \
--flag=containers \
--flag=unordered-containers
}
dev-haskell/base-compat-batteries:=[profile?] >=dev-haskell/hashable-1.1:=[profile?] <dev-haskell/hashable-1.5 =dev-haskell/unordered-containers-0.2*:=[profile?] >=dev-lang/ghc-8.10.6:= >=dev-haskell/cabal-3.2.1.0
dev-haskell/base-compat-batteries:=[profile?] >=dev-haskell/hashable-1.1:=[profile?] <dev-haskell/hashable-1.5 =dev-haskell/unordered-containers-0.2*:=[profile?] >=dev-lang/ghc-8.10.6:=