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

Calculating dependencies ... done!
Dependency resolution took 2.71 s (backtrack: 10/20).

[ebuild  N     ] app-text/dos2unix-7.5.7::gentoo  USE="nls -debug -test -verify-sig" 977 KiB
[ebuild  N     ] dev-lang/ghc-9.0.2-r4:0/9.0.2::gentoo  USE="gmp (-big-endian) -binary -doc -elfutils -ghcbootstrap -ghcmakebinary (-llvm) -numa -profile -test -unregisterised" 147774 KiB
[ebuild  N     ] app-admin/haskell-updater-1.5.0.0::gentoo  45 KiB
[ebuild  N     ] dev-haskell/cabal-3.4.1.0-r1:0/3.4.1.0::gentoo  USE="-doc -hscolour -profile" 848 KiB
[ebuild  N     ] dev-haskell/parsec-3.1.14.0-r2:0/3.1.14.0::gentoo  USE="-doc -hscolour -profile" 40 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/base16-bytestring-1.0.2.0:0/1.0.2.0::gentoo  USE="-doc -hscolour -profile -test" 10 KiB
[ebuild  N     ] dev-haskell/cryptohash-sha256-0.11.102.1-r1:0/0.11.102.1::gentoo  USE="-doc -executable -hscolour -profile -test" 21 KiB
[ebuild  N     ] dev-haskell/regex-base-0.94.0.3:0/0.94.0.3::gentoo  USE="-doc -hscolour -profile" 11 KiB
[ebuild  N     ] dev-haskell/tar-0.5.1.1-r3:0/0.5.1.1::gentoo  USE="-doc -hscolour -profile" 44 KiB
[ebuild  N     ] dev-haskell/zlib-0.6.3.0:0/0.6.3.0::gentoo  USE="-bundled-c-zlib -doc -hscolour -non-blocking-ffi -profile -test" 367 KiB
[ebuild  N     ] dev-haskell/lukko-0.1.2:0/0.1.2::gentoo  USE="-doc -hscolour -profile -test" 33 KiB
[ebuild  N     ] dev-haskell/network-3.2.8.0:0/3.2.8.0::gentoo  USE="-devel -doc -hscolour -profile -test" 143 KiB
[ebuild  N     ] dev-haskell/echo-0.1.4-r1:0/0.1.4::gentoo  USE="-doc -examples -hscolour -profile" 6 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/splitmix-0.1.3.2:0/0.1.3.2::gentoo  USE="-doc -hscolour -optimised-mixer -profile (-test)" 12 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/base-orphans-0.9.3:0/0.9.3::gentoo  USE="-doc -hscolour -profile (-test)" 20 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/base64-bytestring-1.2.1.0-r1:0/1.2.1.0::gentoo  USE="-doc -hscolour -profile -test" 16 KiB
[ebuild  N     ] dev-haskell/ed25519-0.0.5.0-r2:0/0.0.5.0::gentoo  USE="-doc -hscolour -profile" 83 KiB
[ebuild  N     ] dev-haskell/network-uri-2.6.4.2-r1:0/2.6.4.2::gentoo  USE="-doc -hscolour -profile (-test)" 34 KiB
[ebuild  N     ] dev-haskell/hashable-1.4.2.0-r2:0/1.4.2.0::gentoo  USE="-doc -hscolour -profile -random-initial-seed -test" 29 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/regex-posix-0.96.0.2:0/0.96.0.2::gentoo  USE="-doc -hscolour -profile" 14 KiB
[ebuild  N     ] dev-haskell/resolv-0.1.2.0-r1:0/0.1.2.0::gentoo  USE="-doc -hscolour -profile" 154 KiB
[ebuild  N     ] dev-haskell/async-2.2.5-r1:0/2.2.5::gentoo  USE="-doc -hscolour -profile -test" 19 KiB
[ebuild  N     ] dev-haskell/edit-distance-0.2.2.1-r1:0/0.2.2.1::gentoo  USE="-doc -hscolour -profile -test" 13 KiB
[ebuild  N     ] dev-haskell/hackage-security-0.6.2.6:0/0.6.2.6::gentoo  USE="lukko -doc -hscolour -profile" 93 KiB
[ebuild  N     ] dev-haskell/http-4000.4.1-r2:0/4000.4.1::gentoo  USE="-doc -hscolour -profile -test" 79 KiB
[ebuild  N     ] dev-haskell/cabal-install-3.4.1.0-r3::gentoo  USE="lukko native-dns" 643 KiB

Total: 31 packages (31 new), Size of downloads: 151750 KiB

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

dev-haskell/cabal:0

  (dev-haskell/cabal-3.10.3.0:0/3.10.3.0::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile" conflicts with
    <dev-haskell/cabal-3.4.2:= required by (dev-haskell/cabal-install-3.4.1.0-r3:0/0::gentoo, ebuild scheduled for merge) USE="lukko native-dns"
    ^                  ^^^^^  

dev-lang/ghc:0

  (dev-lang/ghc-9.8.4-r1:0/9.8.4::gentoo, ebuild scheduled for merge) USE="gmp (-big-endian) -doc -elfutils -ghcbootstrap -ghcmakebinary -llvm -numa -profile -test -unregisterised -verify-sig" LLVM_SLOT="20 -17 -18 -19" conflicts with
    <dev-lang/ghc-9.1:= required by (dev-haskell/cabal-3.4.1.0-r1:0/3.4.1.0::gentoo, ebuild scheduled for merge) USE="-doc -hscolour -profile"
    ^             ^^^  


!!! The following update(s) have been skipped due to unsatisfied dependencies
!!! triggered by backtracking:

dev-haskell/hashable:0
dev-haskell/text:0
dev-haskell/parsec:0