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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/145 Servers

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10 Oct 2025
@robert:funklause.dedotlambda
In reply to @robert:funklause.de
Is it possible to make it use hledger-lib_1_50?
Still, this would be nice in order to unbreak hledger_1_50
21:24:41
@maralorn:maralorn.demaralorn dotlambda: compare: https://github.com/NixOS/nixpkgs/issues/190542 21:24:49
@maralorn:maralorn.demaralornAre you currently trying to fix a build error?21:25:08
@maralorn:maralorn.demaralornI am slightly confused about the problem.21:25:17
@robert:funklause.dedotlambda
In reply to @maralorn:maralorn.de
Are you currently trying to fix a build error?
Yes. Try building haskellPackages.hledger_1_50. It fails because it needs hledger-lib_1_50.
21:26:22
@maralorn:maralorn.demaralornYeah, makes sense.21:26:37
@maralorn:maralorn.demaralornYeah, you would need to manually override hledger to use the correct hledger-lib version. Belongs into configuration-common.nix. Would be fine to open against master.21:27:40

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