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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/145 Servers

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30 Sep 2025
@bglgwyng:matrix.orgbglgwyngDoes nixpkgs.haskell do sometihng special on HLS, wrapping with some env vars or something? I found that HLS can't find the right package db I configured.04:23:10
@bglgwyng:matrix.orgbglgwynghttps://discord.com/channels/280033776820813825/505370075402862594/1422409401859575969 this is relevant04:23:18
@maralorn:maralorn.demaralornNo, it doesn’t. HLS asks e.g. cabal-install, cabal-install looks at ghc. ghc has the right package db. It’s relevant that you start hls from the right nix-shell for your projetc so that the correct ghc is available.07:11:10
@mangoiv.:matrix.orgMangoIVany ETA for 9.14 and HLS 2.12? Something I can help with there? 15:36:18
@mangoiv.:matrix.orgMangoIV* any ETA for 9.14 and HLS 2.12? Anything I can help with there? 15:36:25
@maralorn:maralorn.demaralornAre those things even released??15:50:52
@maralorn:maralorn.demaralornThe ETA is next hackage bump after release -> fixing hls -> merging haskell-updates into staging -> staging goes to staging-next goes to master.15:52:22
@maralorn:maralorn.demaralornSadly requirements put upon us by the nixos release process are increasingly in tension with the high velocity rollout bleeding edge users require.15:53:07
@maralorn:maralorn.demaralornI guess that takes usually 4 to 8 weeks …15:53:23

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