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/th-abstraction-0.7.2.0:0/0.7.2.0::gentoo  USE="-doc -hscolour -profile -test" 45 KiB
[ebuild  N     ] dev-haskell/th-compat-0.1.7:0/0.1.7::gentoo  USE="-doc -hscolour -profile -test" 15 KiB
[ebuild  N     ] dev-haskell/safe-0.3.21:0/0.3.21::gentoo  USE="-doc -hscolour -profile -test" 14 KiB
[ebuild  N     ] dev-haskell/syb-0.7.2.4:0/0.7.2.4::gentoo  USE="-doc -hscolour -profile -test" 41 KiB
[ebuild  N     ] dev-haskell/th-lift-0.8.7:0/0.8.7::gentoo  USE="-doc -hscolour -profile -test" 15 KiB
[ebuild  N     ] dev-haskell/th-expand-syns-0.4.12.0:0/0.4.12.0::gentoo  USE="-doc -hscolour -profile -test" 7 KiB
[ebuild  N     ] dev-haskell/th-reify-many-0.1.10:0/0.1.10::gentoo  USE="-doc -hscolour -profile -test" 6 KiB
[ebuild  N     ] dev-haskell/th-orphans-0.13.16:0/0.13.16::gentoo  USE="-doc -hscolour -profile -test" 7 KiB

Total: 15 packages (15 new), Size of downloads: 241019 KiB