Install this version:
emerge -a =dev-haskell/concurrent-output-1.10.21If this version is masked, you can unmask it using the autounmask tool or standard emerge options:
autounmask =dev-haskell/concurrent-output-1.10.21Or alternatively:
emerge --autounmask-write -a =dev-haskell/concurrent-output-1.10.21# Copyright 1999-2026 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=8
# ebuild generated by hackport 0.8.5.1.9999
CABAL_FEATURES="lib profile haddock hoogle hscolour"
inherit haskell-cabal
DESCRIPTION="Ungarble output from several threads or commands"
HOMEPAGE="https://hackage.haskell.org/package/concurrent-output"
LICENSE="BSD-2"
SLOT="0/${PV}"
KEYWORDS="~amd64 ~arm64 ~ppc64 ~riscv ~x86"
RDEPEND=">=dev-haskell/ansi-terminal-0.6.2:=[profile?] <dev-haskell/ansi-terminal-1.2.0:=[profile?]
>=dev-haskell/async-2.0:=[profile?] <dev-haskell/async-2.3:=[profile?]
>=dev-haskell/terminal-size-0.3.0:=[profile?] <dev-haskell/terminal-size-0.4.0:=[profile?]
>=dev-haskell/text-0.11.0:=[profile?] <dev-haskell/text-2.2:=[profile?]
>=dev-lang/ghc-9.0.2:=
"
DEPEND="${RDEPEND}
>=dev-haskell/cabal-3.4.1.0
"
>=dev-haskell/ansi-terminal-0.6.2:=[profile?] <dev-haskell/ansi-terminal-1.2.0:=[profile?] >=dev-haskell/async-2.0:=[profile?] <dev-haskell/async-2.3:=[profile?] >=dev-haskell/terminal-size-0.3.0:=[profile?] <dev-haskell/terminal-size-0.4.0:=[profile?] >=dev-haskell/text-0.11.0:=[profile?] <dev-haskell/text-2.2:=[profile?] >=dev-lang/ghc-9.0.2:= >=dev-haskell/cabal-3.4.1.0
>=dev-haskell/ansi-terminal-0.6.2:=[profile?] <dev-haskell/ansi-terminal-1.2.0:=[profile?] >=dev-haskell/async-2.0:=[profile?] <dev-haskell/async-2.3:=[profile?] >=dev-haskell/terminal-size-0.3.0:=[profile?] <dev-haskell/terminal-size-0.4.0:=[profile?] >=dev-haskell/text-0.11.0:=[profile?] <dev-haskell/text-2.2:=[profile?] >=dev-lang/ghc-9.0.2:=