Install this version:
emerge -a =dev-haskell/lawful-conversions-0.4.0
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-haskell/lawful-conversions-0.4.0
Or alternatively:
emerge --autounmask-write -a =dev-haskell/lawful-conversions-0.4.0
# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
CABAL_FEATURES="lib profile haddock hoogle hscolour test-suite"
inherit haskell-cabal
DESCRIPTION="Lawful typeclasses for bidirectional conversion between types"
HOMEPAGE="https://github.com/nikita-volkov/lawful-conversions"
LICENSE="MIT"
SLOT="0/${PV}"
KEYWORDS="~amd64 ~x86"
RDEPEND="dev-haskell/hashable:=[profile?]
dev-haskell/primitive:=[profile?]
dev-haskell/profunctors:=[profile?]
dev-haskell/quickcheck:=[profile?]
dev-haskell/text:=[profile?]
dev-haskell/unordered-containers:=[profile?]
dev-haskell/uuid-types:=[profile?]
dev-haskell/vector:=[profile?]"
DEPEND="${RDEPEND}"
BDEPEND="dev-haskell/cabal
test? ( dev-haskell/quickcheck-instances
dev-haskell/rebase
dev-haskell/tasty
dev-haskell/tasty-quickcheck )"
src_prepare() {
haskell-cabal_src_prepare
sed -i '/license-file/d' lawful-conversions.cabal || die "sed failed"
}
dev-haskell/hashable:=[profile?] dev-haskell/primitive:=[profile?] dev-haskell/profunctors:=[profile?] dev-haskell/quickcheck:=[profile?] dev-haskell/text:=[profile?] dev-haskell/unordered-containers:=[profile?] dev-haskell/uuid-types:=[profile?] dev-haskell/vector:=[profile?]
dev-haskell/hashable:=[profile?] dev-haskell/primitive:=[profile?] dev-haskell/profunctors:=[profile?] dev-haskell/quickcheck:=[profile?] dev-haskell/text:=[profile?] dev-haskell/unordered-containers:=[profile?] dev-haskell/uuid-types:=[profile?] dev-haskell/vector:=[profile?]
dev-haskell/cabal test? ( dev-haskell/quickcheck-instances dev-haskell/rebase dev-haskell/tasty dev-haskell/tasty-quickcheck )