!RbXGJhHMsnQcNIDFWN:nixos.org

Haskell in Nixpkgs/NixOS

695 Members
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 infrastructure138 Servers

You have reached the beginning of time (for this room).


SenderMessageTime
17 Dec 2025
@maralorn:maralorn.demaralorn ncfavier: I don’t remember exactly. It is possible in my memory, but it is always finicky and I would need to read the generic-builder.nix code to figure it out again. 14:42:54
@sellout:matrix.orgselloutI am fighting with this again after supposedly solving it just recently. Trying recover what I did last time (or if I was just mistaken then).15:22:02
@sellout:matrix.orgsellout I thought I had just put Cabal = hfinal.Cabal_3_10_3_0 and same for Cabal-syntax in an overlay, then set it in custom-setup in the Cabal file … but cabal2nix doesn’t care about the custom-setup, so there must have been a third piece. 15:25:02
@sellout:matrix.orgsellout Actually, I think this is right – the issue I was just running into was because I set a flag in configureFlags rather than passing it to callCabal2NixWithOptions (which only mattered because there are build-depends conditionalized by the flag). 17:53:14
@lenny:flipdot.orgLenny.

heyo, a dependency I use got marked broken in 25.11 and is still broken on master.
It looks like there is a fix out here https://github.com/dustin/mqtt-hs/commit/211d5742df9295f75f04ad58a51e6c42f1320515

Do the packages from hackage get updated automatically, or should I open a PR that does something similar to https://github.com/NixOS/nixpkgs/pull/470484/files?

19:04:31
@ncfavier:matrix.orgncfavierOh well, I suppose the package should be fixed to work with recent versions anyway.19:05:42

Show newer messages


Back to Room ListRoom Version: 6