Install this version:
emerge -a =dev-haskell/wai-logger-2.5.1
If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-haskell/wai-logger-2.5.1
Or alternatively:
emerge --autounmask-write -a =dev-haskell/wai-logger-2.5.1
# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
# ebuild generated by hackport 0.9.1.0
CABAL_FEATURES="lib profile haddock hoogle hscolour test-suite"
inherit haskell-cabal
DESCRIPTION="A logging system for WAI"
HOMEPAGE="https://hackage.haskell.org/package/wai-logger"
LICENSE="BSD"
SLOT="0/${PV}"
KEYWORDS="~amd64 ~arm64 ~ppc64 ~riscv ~x86"
RDEPEND="dev-haskell/byteorder:=[profile?]
>=dev-haskell/fast-logger-3:=[profile?]
dev-haskell/http-types:=[profile?]
dev-haskell/network:=[profile?]
>=dev-haskell/wai-2.0.0:=[profile?]
>=dev-lang/ghc-9.0.2:=
"
DEPEND="${RDEPEND}
>=dev-haskell/cabal-3.4.1.0
test? ( dev-haskell/hspec )
"
dev-haskell/byteorder:=[profile?] >=dev-haskell/fast-logger-3:=[profile?] dev-haskell/http-types:=[profile?] dev-haskell/network:=[profile?] >=dev-haskell/wai-2.0.0:=[profile?] >=dev-lang/ghc-9.0.2:= >=dev-haskell/cabal-3.4.1.0 test? ( dev-haskell/hspec )
dev-haskell/byteorder:=[profile?] >=dev-haskell/fast-logger-3:=[profile?] dev-haskell/http-types:=[profile?] dev-haskell/network:=[profile?] >=dev-haskell/wai-2.0.0:=[profile?] >=dev-lang/ghc-9.0.2:=