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

Calculating dependencies ... done!
Dependency resolution took 1.20 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/text-2.1.1:0/2.1.1::gentoo  USE="simdutf -doc -hscolour -profile" 294 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/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/data-array-byte-0.1.0.2:0/0.1.0.2::gentoo  USE="-doc -hscolour -profile (-test)" 7 KiB
[ebuild  N     ] dev-haskell/cereal-0.5.8.3:0/0.5.8.3::gentoo  USE="-doc -hscolour -profile -test" 20 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/void-0.7.4:0/0.7.4::gentoo  USE="-doc -hscolour -profile -safe" 4 KiB
[ebuild  N     ] dev-haskell/integer-logarithms-1.0.5:0/1.0.5::gentoo  USE="-doc -hscolour -profile (-test)" 9 KiB
[ebuild  N     ] dev-haskell/os-string-2.0.8:0/2.0.8::gentoo  USE="-doc -hscolour -profile -test" 44 KiB
[ebuild  N     ] dev-haskell/base-orphans-0.9.3:0/0.9.3::gentoo  USE="-doc -hscolour -profile (-test)" 20 KiB
[ebuild  N     ] dev-haskell/hashable-1.4.7.0:0/1.4.7.0::gentoo  USE="-doc -hscolour -profile -random-initial-seed" 88 KiB
[ebuild  N     ] dev-haskell/primitive-0.9.1.0:0/0.9.1.0::gentoo  USE="-doc -hscolour -profile (-test)" 64 KiB
[ebuild  N     ] dev-haskell/onetuple-0.4.2.1:0/0.4.2.1::gentoo  USE="-doc -hscolour -profile -test" 6 KiB
[ebuild  N     ] dev-haskell/binary-orphans-1.0.5:0/1.0.5::gentoo  USE="-doc -hscolour -profile -test" 6 KiB
[ebuild  N     ] dev-haskell/scientific-0.3.8.1:0/0.3.8.1::gentoo  USE="-doc -hscolour -profile (-test)" 24 KiB
[ebuild  N     ] dev-haskell/unordered-containers-0.2.21:0/0.2.21::gentoo  USE="-doc -hscolour -profile -test" 71 KiB
[ebuild  N     ] dev-haskell/bytes-0.17.4:0/0.17.4::gentoo  USE="-doc -hscolour -profile" 18 KiB

Total: 21 packages (21 new), Size of downloads: 241292 KiB