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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://nixos.org/manual/nixpkgs/unstable/#haskell | Current PR: https://github.com/nixos/nixpkgs/pulls?q=is%3Apr+is%3Aopen+head%3Ahaskell-updates | Maintainer Docs: https://github.com/NixOS/nixpkgs/blob/haskell-updates/pkgs/development/haskell-modules/HACKING.md | More Nix: #community:nixos.org | More Haskell: #haskell-space:matrix.org | Merger Schedule: https://cloud.maralorn.de/apps/calendar/p/H6migHmKX7xHoTFa/dayGridMonth/now | Join #haskell.nix:libera.chat for question about the alternative haskell.nix infrastructure138 Servers

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7 Oct 2025
@teoc:matrix.orgteo (they/he)We don't really have a path forward here to use lld be default for Haskell other than to make stdenv use lld, right?10:12:45
@profpatsch:augsburg.oneProfpatsch> A naive rg gives us a place to start10:15:56
@profpatsch:augsburg.oneProfpatschHave GenZ really started saying rg instead of grepping? SAD10:16:09
@shapr:cofree.coffeeshaprI've forgotten how to use hackage libraries that aren't in stackage, is there a guide I can read to remind me how to do all the Haskell things with Nix?12:39:52
@alex:tunstall.xyzAlex
In reply to @shapr:cofree.coffee
I've forgotten how to use hackage libraries that aren't in stackage, is there a guide I can read to remind me how to do all the Haskell things with Nix?
They are just there unless they're really new.
12:41:11
@shapr:cofree.coffeeshapr I'm trying to use granite which might be really new? 12:41:42
@alex:tunstall.xyzAlex
In reply to @shapr:cofree.coffee
I'm trying to use granite which might be really new?
It's already in nixpkgs unstable (0.3.0.0).
12:46:28
@dandart:matrix.orgUraraka ~ OchacoWhat is this some kind of hipster find13:28:13
@shapr:cofree.coffeeshapr
In reply to @alex:tunstall.xyz
It's already in nixpkgs unstable (0.3.0.0).
thank you!
14:07:12
@shapr:cofree.coffeeshaprNext question, is there an easy way to use granite without running the failing test suite?14:23:14
@maralorn:maralorn.demaralornApply haskell.lib.compose.dontCheck to the granite package.14:26:13
@alunduil:matrix.orgalunduil changed their profile picture.23:11:51
8 Oct 2025
@sternenseemann:systemli.orgsterniwe can, it's just ugly18:20:49
@sternenseemann:systemli.orgsterniat least we should be able to, I don't know how C++ will behave18:21:06
@sternenseemann:systemli.orgsterni shapr: you can copy what we're doing here which will land in master soon hopefully https://github.com/NixOS/nixpkgs/pull/445213/commits/5ba41f20b22b393092a91ce44e414f70613917db 18:22:27

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