These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 1.17 s (backtrack: 0/20).

[ebuild  N     ] app-text/dos2unix-7.5.7::gentoo  USE="nls -debug -test -verify-sig" 977 KiB
[ebuild  N     ] dev-lang/ghc-9.8.4-r1:0/9.8.4::gentoo  USE="gmp (-big-endian) -doc -elfutils -ghcbootstrap -ghcmakebinary -llvm -numa -profile -test -unregisterised -verify-sig" LLVM_SLOT="20 -17 -18 -19" 238903 KiB
[ebuild  N     ] app-admin/haskell-updater-1.5.0.0::gentoo  45 KiB
[ebuild  N     ] dev-haskell/parsec-3.1.17.0:0/3.1.17.0::gentoo  USE="-doc -hscolour -profile" 38 KiB
[ebuild  N     ] dev-haskell/text-2.1.1:0/2.1.1::gentoo  USE="simdutf -doc -hscolour -profile" 294 KiB
[ebuild  N     ] dev-haskell/cabal-syntax-3.10.3.0:0/3.10.3.0::gentoo  USE="-doc -hscolour -profile" 228 KiB
[ebuild  N     ] dev-haskell/cabal-3.10.3.0:0/3.10.3.0::gentoo  USE="-doc -hscolour -profile" 389 KiB
[ebuild  N     ] dev-haskell/transformers-compat-0.7.2:0/0.7.2::gentoo  USE="-doc -hscolour -profile" 46 KiB
[ebuild  N     ] dev-haskell/colour-2.3.6:0/2.3.6::gentoo  USE="-doc -hscolour -profile (-test)" 21 KiB
[ebuild  N     ] dev-haskell/ansi-terminal-0.10.3:0/0.10.3::gentoo  USE="-doc -example -hscolour -profile" 36 KiB
[ebuild  N     ] dev-haskell/ansi-wl-pprint-0.6.9:0/0.6.9::gentoo  USE="-doc -examples -hscolour -profile" 19 KiB
[ebuild  N     ] dev-haskell/optparse-applicative-0.16.1.0:0/0.16.1.0::gentoo  USE="-doc -hscolour -profile -test" 62 KiB

Total: 12 packages (12 new), Size of downloads: 241053 KiB