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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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15 Sep 2025
@sternenseemann:systemli.orgsterni (he/him)should be testu-01, not testu01 from your example?12:26:50
@sternenseemann:systemli.orgsterni (he/him) 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.orgsterni (he/him)You 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
@emilazy:matrix.orgemilyis real Cabal not flexible enough? can't build with MicroHs?12:56:28
@b:chreekat.netchreekatYeah it relies on many language extensions that Lennart doesn't plan to support12:58:13

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