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Haskell in Nixpkgs/NixOS

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For discussions and questions about Haskell with Nix, cabal2nix and haskellPackages in nixpkgs | Current Docs: https://haskell4nix.readthedocs.io/147 Servers

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31 Aug 2025
@dandart:matrix.orgEmber Voidwth a load of servant in it17:46:22
@lxsameer:matrix.orglxsameercool cool. seems like i can handle my workload with it17:46:47
@maralorn:maralorn.demaralorn
In reply to @dandart:matrix.org
maybe it's to make things nix-buildable?
either way a full install with prefix will still build manually
Yes, it is to make things nix buildable.
17:46:50
@maralorn:maralorn.demaralornBut it's still very rough around the reges.17:48:16
@maralorn:maralorn.demaralorn * 17:48:26
@dandart:matrix.orgEmber VoidI kind of gave up nix-building haskell projects because I wanted to keep up with hackage versions (and especially text 2.1.2) - I had to keep jailbreaking things but the package versions in nixpkgs unstable / haskell-updates were still very behind. I presume they were up to date with various stackage snapshots but I don't use stack as I end up missing updates. I ended up just doing it by getting only ghc and cabal through nix-shell, and then getting cabal to do everything cabal style. That way I can allow people who don't want to use nix be able to do things just as well with ghcup. hence haven't tried to nix-build any haskell bits in a good while.17:52:03
@maralorn:maralorn.demaralornYes, nixpkgs will lag behind, especially in the last year because we get to little help maintaining it. But very often not having the bleeding edge is fine for most usecases.18:22:12
@dandart:matrix.orgEmber Voidthat's fair enough, I have contributed fixes to it before18:23:22
1 Sep 2025
@artem.types:matrix.orgArtemregarding https://github.com/NixOS/nixpkgs/pull/429810#issuecomment-3242423178 it's curious that the test suite hangs on "network client and server" (the last line) Something about network configuration on hydra machines?..13:46:14

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