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

Calculating dependencies ... done!
Dependency resolution took 1.19 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/call-stack-0.4.0:0/0.4.0::gentoo  USE="-doc -hscolour -profile -test" 3 KiB
[ebuild  N     ] dev-haskell/splitmix-0.1.3.2:0/0.1.3.2::gentoo  USE="-doc -hscolour -optimised-mixer -profile (-test)" 12 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/clock-0.8.4:0/0.8.4::gentoo  USE="-doc -hscolour -profile (-test)" 10 KiB
[ebuild  N     ] dev-haskell/setenv-0.1.1.3:0/0.1.1.3::gentoo  USE="-doc -hscolour -profile" 3 KiB
[ebuild  N     ] dev-haskell/stm-2.5.3.1:0/2.5.3.1::gentoo  USE="-doc -hscolour -profile" 17 KiB
[ebuild  N     ] dev-haskell/random-1.2.1.3:0/1.2.1.3::gentoo  USE="-doc -hscolour -profile -test" 47 KiB
[ebuild  N     ] dev-haskell/hunit-1.6.2.0-r1:0/1.6.2.0::gentoo  USE="-doc -hscolour -profile -test" 21 KiB
[ebuild  N     ] dev-haskell/ansi-terminal-types-1.1.3:0/1.1.3::gentoo  USE="-doc -hscolour -profile" 9 KiB
[ebuild  N     ] dev-haskell/quickcheck-2.15.0.1:0/2.15.0.1::gentoo  USE="template-haskell -doc -hscolour -profile -test" 89 KiB
[ebuild  N     ] dev-haskell/ansi-terminal-1.1.5:0/1.1.5::gentoo  USE="-doc -examples -hscolour -profile" 33 KiB
[ebuild  N     ] dev-haskell/quickcheck-io-0.2.0:0/0.2.0::gentoo  USE="-doc -hscolour -profile" 2 KiB
[ebuild  N     ] dev-haskell/hspec-meta-2.9.3:0/2.9.3::gentoo  USE="-doc -hscolour -profile" 68 KiB

Total: 20 packages (20 new), Size of downloads: 241199 KiB