haskellPackages: Stackage LTS 22 -> 23; ghc: 9.6.6 -> 9.8.4

[sternenseemann]

This Merge

This PR is the regular merge of the haskell-updates branch into staging.

This branch is being continually built and tested by hydra at https://hydra.nixos.org/jobset/nixpkgs/haskell-updates. You may be able to find an up-to-date Hydra build report at cdepillabout/nix-haskell-updates-status.

We roughly aim to merge these haskell-updates PRs at least once every two weeks. See the @NixOS/haskell team calendar for who is currently in charge of this branch.

haskellPackages Workflow Summary

Our workflow is currently described in pkgs/development/haskell-modules/HACKING.md.

The short version is this:

• We regularly update the Stackage and Hackage pins on haskell-updates (normally at the beginning of a merge window).
• The community fixes builds of Haskell packages on that branch.
• We aim at at least one merge of haskell-updates into staging every two weeks.
• We only do the merge if the mergeable job is succeeding on hydra.
• If a maintained package is still broken at the time of merge, we will only merge if the maintainer has been pinged 7 days in advance. (If you care about a Haskell package, become a maintainer!)

More information about Haskell packages in nixpkgs can be found in the nixpkgs manual.

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This is the follow-up to #369373. Come to #haskell:nixos.org if you have any questions.