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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/ | More Nix: #community:nixos.org | More Haskell: #haskell-space:matrix.org146 Servers

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27 Apr 2025
@sternenseemann:systemli.orgsterni (he/him)* specifically what derivation?09:53:35
@aleksana:mozilla.orgFind me at aleksana:qaq.li
In reply to @sternenseemann:systemli.org
specifically what derivation.
Ideally pkgsCross.loongarch64-linux.haskell.compilers.ghc94
09:54:23
@aleksana:mozilla.orgFind me at aleksana:qaq.lighc98409:54:32
@sternenseemann:systemli.orgsterni (he/him) That would set finalStage = Stage2 if the assert were removed. ghc94 would also do Stage2. 09:57:52
@sternenseemann:systemli.orgsterni (he/him)Can't really tell you why you are seeing just stage1, though since you are obviously working on some kind of wip tree?09:58:28
@aleksana:mozilla.orgFind me at aleksana:qaq.li
In reply to @sternenseemann:systemli.org
Can't really tell you why you are seeing just stage1, though since you are obviously working on some kind of wip tree?
No, I'm working on nixpkgs master
09:58:44
@aleksana:mozilla.orgFind me at aleksana:qaq.li
In reply to @sternenseemann:systemli.org
That would set finalStage = Stage2 if the assert were removed. ghc94 would also do Stage2.
I'm building the cross compiler, yes, just didn't know this can be changed
09:59:31
@alexfmpe:matrix.orgalexfmpeI want to remove a lib.warn from a derivation, AFAICT that causes no rebuilds whatsoever so does it go to master so it gets merged back into staging-next and haskell-updates?11:31:05
@alexfmpe:matrix.orgalexfmpe* I want to remove a lib.warn from a derivation, AFAICT that causes no rebuilds whatsoever should it go to master so that it gets merged back into staging-next and haskell-updates?11:31:22
@maralorn:maralorn.demaralornA Haskell lib?11:36:30
@maralorn:maralorn.demaralornimo you can do whatever you want. Small changes which cause little rebuilds are always allowed to go to master in our new paradigm.11:37:08
@maralorn:maralorn.demaralornMerging to haskell-updates is always fine.11:37:27
@alex:tunstall.xyzAlex
In reply to @aleksana:mozilla.org
Generating the tarball just needs some cutoff before installPhase, so omit this now
Nixpkgs outputs can be used as is by using nix-copy-closure or nix copy to upload them to the target machine.
If you need a tarball, there is also nix-store --export or nix nar pack.
13:19:23
@alexfmpe:matrix.orgalexfmpehuh I messed up and force pushed the remove warning to haskell-updates instead of to my branch but AFAICT was rebased properly so all that happened is I removed the warning directly on haskell-updates instead of doing a PR against it16:53:33
@maralorn:maralorn.demaralornWe have branch protection, so afaik you couldn't have pushed it if it wasn't a forward.17:11:08
@alexfmpe:matrix.orgalexfmpeI think the force bit in force push is lazy17:58:57
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28 Apr 2025
@charlotte:vanpetegem.mechvp left the room.14:30:17
29 Apr 2025
@ortolanbunting3002:tchncs.deortolanbunting3002 joined the room.01:26:35
@woobilicious:matrix.orgwoobilicious man I'm having this super weird issue where typed-process in ghci via nix-shell has the Process type, but nix shell for my haskell script doesn't 06:15:28
@alex:tunstall.xyzAlex
In reply to @woobilicious:matrix.org
man I'm having this super weird issue where typed-process in ghci via nix-shell has the Process type, but nix shell for my haskell script doesn't
Different Nixpkgs versions?
07:03:34
@woobilicious:matrix.orgwoobiliciousshould be the same version, I think it's just a quirk of the package, I was using it to pattern match so I just changed my code, which was required for the next step anyway.07:08:52
@woobilicious:matrix.orgwoobiliciousConverting a bash script to Haskell just because I can lol.07:10:36
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30 Apr 2025
@devalot:matrix.org@devalot:matrix.org left the room.09:06:01
@JoelMcCracken:matrix.orgJoelMcCracken curious, on hackage it appears that typed-process had a Process type since the first published version 13:32:52
@malteneuss:matrix.org@malteneuss:matrix.org joined the room.16:56:29
1 May 2025
@nrs-status:matrix.orgthirdofmay18081814goyaIs there a way to package a cabal-install such that it comes with a user config?16:59:58
@nrs-status:matrix.orgthirdofmay18081814goyai.e. with what would be usually in $HOME/.cabal/config17:00:29

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