haskellPackages: stackage LTS 24.27 -> LTS 24.29

[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 #478767. Come to #haskell:nixos.org if you have any questions.

[sternenseemann]

News w.r.t. c2hs: #478368 (comment)

[sternenseemann]

-.- accidentally pushed staging to haskell-updates.

[sternenseemann]

staging has become staging-next, so we can start new evals once staging-next has progressed further along at the end of the week or so.

[wolfgangwalther]

We currently don't have an open haskell-updates PR (it's my turn right now, and I plan to open one soon), so I'm posting here:

@mdaniels5757 I see you have been fixing the automatic merge for haskell-updates a few times in the last couple of days - thank you. However, I now noticed 3 times in a row, that after the merge the haskell-updates branch has broken treefmt or eval and I had to fix it manually.

Please make sure to run treefmt and nix-build ci -A eval.baseline locally before pushing to the haskell-updates branch after fixing conflicts - and fixing any errors in the merge commit itself.

[mdaniels5757]

Oops, sorry! Yes, of course.