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Research of IFD issue from callCabal2nix #1

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opened 2026-05-18 07:59:53 +00:00 by xfeusw · 11 comments
xfeusw commented 2026-05-18 07:59:53 +00:00
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To setup Haskell project in Nix, we usually use callCabal2nix (e.g. relago-support). As it is written using Haskell, it's not unusual that we meet IFD (import from derivation) issue from Nix.

So, we need to fix it

To setup Haskell project in Nix, we usually use [`callCabal2nix`](https://github.com/NixOS/nixpkgs/blob/9c305c7f7cc785d84143905b042570c0c6bf7312/pkgs/development/haskell-modules/cabal2nix-unstable/cabal2nix.nix#L2) (e.g. [`relago-support`](https://git.oss.uzinfocom.uz/xinux/relago-support)). As it is written using Haskell, it's not unusual that we meet [IFD](https://nixcademy.com/posts/what-is-ifd-ups-and-downs/) (import from derivation) issue from Nix. So, we need to fix it
xfeusw commented 2026-05-18 08:00:02 +00:00
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I found out about cabal2nixWithoutIFD

I found out about [`cabal2nixWithoutIFD`](https://github.com/cdepillabout/cabal2nixWithoutIFD)
xfeusw commented 2026-05-18 08:00:07 +00:00
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Found - Native support for import for derivation in Hercules

Found - [Native support for import for derivation in Hercules](https://blog.hercules-ci.com/2019/08/30/native-support-for-import-for-derivation/)
xfeusw commented 2026-05-18 08:00:16 +00:00
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Figure out how to make IFD work properly

[Figure out how to make IFD work properly](https://github.com/NixOS/nix/issues/954)
xfeusw commented 2026-05-18 08:00:23 +00:00
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Generate Hackage/LTS nix expressions on the fly rather than have them in the repo

[Generate Hackage/LTS nix expressions on the fly rather than have them in the repo](https://github.com/NixOS/nixpkgs/issues/16130)
xfeusw commented 2026-05-18 08:00:30 +00:00
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https://github.com/NixOS/nixpkgs/issues/16130#issuecomment-229939552

https://github.com/NixOS/nixpkgs/issues/16130#issuecomment-229939552
xfeusw commented 2026-05-18 08:00:36 +00:00
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https://github.com/NixOS/nix/issues/954#issuecomment-365281661

https://github.com/NixOS/nix/issues/954#issuecomment-365281661
xfeusw commented 2026-05-18 08:00:41 +00:00
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Purely functional metadata-rich derivation poisoning

[Purely functional metadata-rich derivation poisoning](https://github.com/NixOS/nix/issues/1052)
xfeusw commented 2026-05-18 08:25:08 +00:00
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@xfeusw wrote in #1 (comment):

I found out about cabal2nixWithoutIFD

Researching PureScript because of cabal2nixWithoutIFD. Besides, researching PureNix too. Because cabal2nixWithoutIFD is written in PureScript and transpiled to Nix via PureNix

@xfeusw wrote in https://git.oss.uzinfocom.uz/xfeusw/contributions/issues/1#issuecomment-443: > I found out about [`cabal2nixWithoutIFD`](https://github.com/cdepillabout/cabal2nixWithoutIFD) Researching [PureScript](https://www.purescript.org/) because of `cabal2nixWithoutIFD`. Besides, researching [PureNix](https://github.com/purenix-org/purenix) too. Because cabal2nixWithoutIFD is written in PureScript and transpiled to Nix via PureNix
xfeusw commented 2026-05-18 08:44:27 +00:00
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I should check out Hydra configuration and also should research about allowing IFD in Hydra according to edolstra's comment

I should check out Hydra configuration and also should research about allowing IFD in Hydra according to [edolstra's comment](https://git.oss.uzinfocom.uz/xfeusw/contributions/issues/1#issuecomment-447)
xfeusw commented 2026-05-18 08:45:33 +00:00
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github:justinwoo/easy-purescript-nix

[github:justinwoo/easy-purescript-nix](https://github.com/justinwoo/easy-purescript-nix)
xfeusw commented 2026-05-22 12:26:44 +00:00
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https://stackoverflow.com/questions/27968909/how-to-get-cabal-and-nix-work-together

https://stackoverflow.com/questions/27968909/how-to-get-cabal-and-nix-work-together
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