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

Calculating dependencies ... done!
Dependency resolution took 1.64 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-1.2.5.0-r1:0/1.2.5.0::gentoo  USE="-doc -hscolour -profile" 153 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/splitmix-0.1.3.2:0/0.1.3.2::gentoo  USE="-doc -hscolour -optimised-mixer -profile (-test)" 12 KiB
[ebuild  N     ] dev-haskell/lua-2.2.0:0/2.2.0::gentoo  USE="-doc -hscolour -profile -system-lua -test" 254 KiB
[ebuild  N     ] dev-haskell/hslua-core-2.2.0:0/2.2.0::gentoo  USE="-doc -hscolour -profile -test" 36 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/hslua-marshalling-2.2.0:0/2.2.0::gentoo  USE="-doc -hscolour -profile -test" 17 KiB
[ebuild  N     ] dev-haskell/temporary-1.3-r1:0/1.3::gentoo  USE="-doc -hscolour -profile -test" 6 KiB
[ebuild  N     ] dev-haskell/hslua-objectorientation-2.2.0:0/2.2.0::gentoo  USE="-doc -hscolour -profile -test" 15 KiB
[ebuild  N     ] dev-haskell/hslua-packaging-2.2.0:0/2.2.0::gentoo  USE="-doc -hscolour -profile -test" 16 KiB
[ebuild  N     ] dev-haskell/hslua-module-system-1.0.3:0/1.0.3::gentoo  USE="-doc -hscolour -profile -test" 9 KiB

Total: 16 packages (16 new), Size of downloads: 241138 KiB

WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:

dev-haskell/hslua-core:0

  (dev-haskell/hslua-core-2.3.2.1:0/2.3.2.1::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile -test" conflicts with
    <dev-haskell/hslua-core-2.3:= required by (dev-haskell/hslua-marshalling-2.2.0:0/2.2.0::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile -test"
    ^                       ^^^  
    <dev-haskell/hslua-core-2.3:= required by (dev-haskell/hslua-objectorientation-2.2.0:0/2.2.0::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile -test"
    ^                       ^^^  
    <dev-haskell/hslua-core-2.3:= required by (dev-haskell/hslua-packaging-2.2.0:0/2.2.0::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile -test"
    ^                       ^^^  

dev-haskell/lua:0

  (dev-haskell/lua-2.3.4:0/2.3.4::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile -system-lua -test" conflicts with
    <dev-haskell/lua-2.3:= required by (dev-haskell/hslua-core-2.2.0:0/2.2.0::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile -test"
    ^                ^^^