portage-ng / portage / dev-haskell / mtl / 2.2.2-r2
pmerge --pretend --verbose
!!! resolution failed
!!! request ( ( ('repo.livefs',) EqualityMatch: =False || ( ('category',) == virtual && ('package_is_real',) EqualityMatch: =False ) ) && =dev-haskell/mtl-2.2.2-r2 ), mode none
!!! trying dev-haskell/mtl-2.2.2-r2
!!!   request <dev-lang/ghc-9.5, mode depend
!!!   trying dev-lang/ghc-9.2.8
!!!     failed due to failed inserting: [<PackageWrapper pkg=<<class 'pkgcore.ebuild.ebuild_src.package'> cpv='dev-lang/ghc-9.8.4-r1' @0x1064c8f70> wrapped='use' @0x106685f50>]
!!!   trying dev-lang/ghc-9.0.2-r4
!!!     failed due to failed inserting: [<PackageWrapper pkg=<<class 'pkgcore.ebuild.ebuild_src.package'> cpv='dev-lang/ghc-9.8.4-r1' @0x1064c8f70> wrapped='use' @0x106685f50>]
!!!   removing choices involving <dev-lang/ghc-9.5

Failures encountered:
!!! failed '( ( ('repo.livefs',) EqualityMatch: =False || ( ('category',) == virtual && ('package_is_real',) EqualityMatch: =False ) ) && =dev-haskell/mtl-2.2.2-r2 )'
potentials:
repo gentoo: [ ebuild src: dev-haskell/mtl-2.2.2-r2 ]

Wall time
0.441 s vs. 0.055 s for portage-ng