Haskell in Nixpkgs/NixOS - Public Room Timeline

	Haskell in Nixpkgs/NixOS	699 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 infrastructure	138 Servers

Sender	Message	Time
1 Jan 2026
	@deb776:tedomum.net	02:52:05
	@deb776:tedomum.net left the room.	02:53:10
4 Jan 2026
	Find me at aleksana:qaq.li changed their display name from aleksana 🏳️‍⚧️ (force me to bed after 18:00 UTC) to aleksana 🏳️‍⚧️ (deprecated).	17:12:55
	Find me at aleksana:qaq.li changed their display name from aleksana 🏳️‍⚧️ (deprecated) to Find me at aleksana:qaq.li.	17:14:40
5 Jan 2026
	connor (burnt/out) (UTC-8) joined the room.	17:56:26
6 Jan 2026
maralorn	So … What is the 2026 way of running doctests as part of my nix-build?	12:36:15
Pierre Thierry	I'm trying to work on `monoidal-functors`, but although `nix build` succeeds, doing `cabal build` either from `nix develop` or my shell with `direnv` and `use flake` fails with `unknown package: these (dependency of monoidal-functors)`	14:44:48
toonn	Might Cabal be picking up a different GHC?	14:46:14
Pierre Thierry	It doesn't look like it, `cabal --verbose build` says `Running: /nix/store/a8h81f4wc2nc8qgrfsxvgfd8has0xh3r-ghc-9.6.3/bin/ghc --print-global-package-db` and the flake says `ghc963`	14:48:51