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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 infrastructure142 Servers

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18 Mar 2026
@me:linj.techlinjJust found a new nix interpreter implemented from scratch in Haskell https://github.com/Novavero-AI/nova-nix. Any comments?11:05:00
@b:chreekat.netchreekatBig if true11:20:30
@alexfmpe:matrix.orgalexfmpeAuthor has been announcing it in couple rooms11:29:16
@alexfmpe:matrix.orgalexfmpeSeems like AI slop11:29:25
@alexfmpe:matrix.orgalexfmpe> Hand-rolled recursive descent parser for the full Nix expression language. 13 precedence levels, 18 AST constructors,11:29:30
@alexfmpe:matrix.orgalexfmpe"Now with 30% more precedence levels. Buy 3, take 4"11:30:37
@alexfmpe:matrix.orgalexfmpe* "Now with 30% more precedence levels. Buy 3, get 4"11:31:20
@magic_rb:matrix.redalder.orgmagic_rbIt is AI slop11:32:48
@magic_rb:matrix.redalder.orgmagic_rbIts fully slop-coded, top to bottom11:33:02
@woobilicious:matrix.orgwoobiliciousNothing screams "Haskell" coding like using a probalitistic LLM...11:33:04
@magic_rb:matrix.redalder.orgmagic_rbIndeed, i have interest in reviewing or using slop-coded code in my free time. The code produced is always subtly wrong and weirdly organized, I've better things to do with my life11:34:57
@magic_rb:matrix.redalder.orgmagic_rb * 11:35:09
@morj:morj.menMorj
Nothing screams "Haskell" coding like using a probalitistic LLM...
If it compiles it works, right
12:00:07
@morj:morj.menMorjI remember in chat they were going to use it to distribute their games for windows. If it works for that, that would be cool if horrifying12:09:11
@morj:morj.menMorj* I remember in chat they were going to use the new nix impl to distribute their games for windows. If it works for that, that would be cool if horrifying12:09:20
@mangoiv.:matrix.orgMangoIV

sternimaralorn I would like to invite you to a discussion on coordination of downstream release testing https://gitlab.haskell.org/ghc/ghc/-/issues/27061

I hear that you already had this discussion last ZuriHac with teo (they/he) since the main effort for downstream testing is currently head.hackage but I think we could all benefit for a more coordinated effort across distributors and the GHC maintainers.

Thanks in advance.

12:48:25

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