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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/146 Servers

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10 Mar 2026
@sternenseemann:systemli.orgsterni chreekat: well it's forever now… 10:00:30
@adrielus:matrix.orgprescientmoon changed their profile picture.11:07:59
11 Mar 2026
@itamar:apttp.xyzitamar joined the room.00:38:04
@alexfmpe:matrix.orgalexfmpeI'm truly confused... https://github.com/NixOS/nixpkgs/commit/34f316a97a3e0e69bea9b44cd1142f7e73557437 broke haskell.packages.ghc914.haskell-debugger - reverting the commit fixes it the reason is that the older hie-bios's bounds do not build with 9.14 boot libs however, switching back to recent hie-bios in configuration-9.14.nix causes failures in the test suite when building hie-bios??? oddly enough, the older hie-bios does build with jailbreak14:52:55
@alexfmpe:matrix.orgalexfmpe* I'm truly confused... https://github.com/NixOS/nixpkgs/commit/34f316a97a3e0e69bea9b44cd1142f7e73557437 broke haskell.packages.ghc914.haskell-debugger - reverting the commit fixes it the reason is that the older hie-bios's bounds do not build with 9.14 boot libs however, switching back to recent hie-bios in configuration-9.14.nix causes failures in the test suite when building hie-bios??? the older hie-bios does build with jailbreak, doesn't seem like much changed for 9.14: https://github.com/haskell/hie-bios/commits/master/14:53:23
@sternenseemann:systemli.orgsternialexfmpe: you probably lose an override that is otherwise applied to hie-bios19:06:52
@sternenseemann:systemli.orgsternithe order of the overlays matters and it is not always ideal19:07:13
@alexfmpe:matrix.orgalexfmpeAaaah yeah could be, I PR'd jailbreak for now since it works19:12:42
12 Mar 2026
@sternenseemann:systemli.orgsternialexfpe: https://hydra.nixos.org/build/32399395820:35:21
@sternenseemann:systemli.orgsterni* alexfmpe: https://hydra.nixos.org/build/32399395820:35:26
@sternenseemann:systemli.orgsterni alexfmpe: probably a regression from 9.12.2 -> 9.12.3, curious 21:47:51

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