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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/ | More Nix: #community:nixos.org | More Haskell: #haskell-space:matrix.org148 Servers

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9 Jul 2025
@sellout:matrix.orgselloutThanks for the response – it at least gives me more to explore.16:51:15
11 Jul 2025
@jose:storopoli.comJose Storopoli joined the room.17:50:21
12 Jul 2025
@prsteele:matrix.orgPatrick SteeleLate response, but NixOS on WSL2.02:17:45
13 Jul 2025
@kephaspierre:matrix.orgPierre Thierry

I want HLS for GHC 9.6.6 to match what a Stack project is using, so I tried a shell.nix file with:
pkgs.mkShell {packages = [pkgs.haskell.packages.ghc966.ghcWithPackages (p: [p.haskell-language-server])];}

But the test suite of zlib fails on check compress large chunk: Test suite tests: FAIL

18:11:02
@kephaspierre:matrix.orgPierre ThierryI'm not sure how to debug/fix that…18:11:10
@kephaspierre:matrix.orgPierre Thierry(is there a better way to get the HLS for GHC 9.6.6?)18:30:36
@maralorn:maralorn.demaralorn @kephaspierre:matrix.org We need more context for that error message. Is it while building the nix shell failing the zlib derivation? There are different ways but at this point I don't see how they would fix the problem. 22:18:59
@alexfmpe:matrix.orgalexfmpeyay, gi-foo packages got fixed with LTS bump22:50:54
@alexfmpe:matrix.orgalexfmpeI was utterly on the dark about that22:51:20

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