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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/137 Servers

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21 Sep 2025
@emilazy:matrix.orgemily I would say, if this is an "if Darwin, one package, else another" type thing, and the fallback case works fine, then just do that. if it's a dependency only used on Darwin, file_cmds seems more canonical. 14:24:59
@emilazy:matrix.orgemily it looks like GHC is literally the only thing using darwin.(file_cmds.)xattr, though, and the only other thing using darwin.file_cmds is the somewhat stupendously useless darwin.mail_cmds. so if I ever get around to cleaning up some of the source releases that seem like busywork to maintain it's possible it would go away anyway. (OTOH maybe Swift Build will make them less busywork since we can reuse the upstream build systems more.) 14:26:57
@emilazy:matrix.orgemily uh, what does GHC want an xattr(1) for, anyway? 14:27:04
@sternenseemann:systemli.orgsternihttps://gitlab.haskell.org/ghc/ghc/-/commit/bf65a7c388b14:41:54

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