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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 infrastructure133 Servers

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15 Sep 2025
@emilazy:matrix.orgemilyespecially since we can have MicroHs bootstrap from hugs12:26:15
@emilazy:matrix.orgemily @alex:tunstall.xyz has that Nixified apparently 12:26:28
@sternenseemann:systemli.orgsternishould be testu-01, not testu01 from your example?12:26:50
@sternenseemann:systemli.orgsterni bglgwyng: override allows you to use the result of callPackage and call the underlying lambda again with different argument, completely recomputing the value: https://github.com/NixOS/nixpkgs/blob/f501ecd2f4b1b8c4f43fee3f1d5cf3e758c2e166/lib/customisation.nix#L116-L208 12:28:43
@sternenseemann:systemli.orgsterniYou can of course not change the underlying function. I'm not entirely sure what you are trying to do.12:29:10
@alex:tunstall.xyzAlex Sure, I can contribute a package set later this week.
There might be a fair bit of flux from frequent upstream changes, but I doubt that'll be much of an issue.
12:53:41
@emilazy:matrix.orgemilywhy does it need its own Cabal btw?12:56:19

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