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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/140 Servers

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22 Sep 2025
@maralorn:maralorn.demaralornI mean, tbf. nixpkgs commit history is a mess anyway. So we can probably just do it …12:34:58
@sternenseemann:systemli.orgsterni (he/him)https://github.com/NixOS/nixpkgs/pull/443159 can also go into haskell-updates12:54:47
@sternenseemann:systemli.orgsterni (he/him)I think half of all haskell related commits from the last two months exist twice already12:55:26
@maralorn:maralorn.demaralornYou would probably have had it easier to convince me in this discussion if you had informed me that one of the PRs not being able to merge because the missing cherry-picks mad conflicts more likely was mine.18:01:25
23 Sep 2025
@a-kenji:matrix.orgkenji changed their display name from a-kenji to kenji.10:39:01
@teoc:matrix.orgTeo (he/him)Is there an easy way to create a dev shell where I can use GHC with the llvm backend? Ideally without having to recompile ghc12:25:26
@teoc:matrix.orgTeo (he/him)Oh wait maybe it's fine with stuff just being on the PATH12:27:39
@teoc:matrix.orgTeo (he/him)it spews some warnings about versions but continues anyway12:27:54
@sternenseemann:systemli.orgsterni (he/him) teo (they/he): (ghc.withPackages.override { useLLVM = true; }) (p: [ … ]) it's even documented :-) 13:26:01
@sternenseemann:systemli.orgsterni (he/him) though you still have to pass -fllvm that's a misleading name (thanks to me) 13:26:23
@teoc:matrix.orgTeo (he/him)Nice thanks! Yeah it's a bit silly. Hopefully we will have better ways to specify these things soon.13:36:24
@teoc:matrix.orgTeo (he/him)* Nice thanks! Yeah it's a bit silly. Hopefully we will have better ways to specify these things soon (through like the toolchain specification or something).13:37:07
@alex:tunstall.xyzAlex
In reply to @teoc:matrix.org
Nice thanks! Yeah it's a bit silly. Hopefully we will have better ways to specify these things soon.
The replaceStdenv stuff already exists, but it won't save you from rebuilding GHC.
19:02:13
@alist:matrix.orgyliceee changed their display name from λlice to yliceee.20:01:46
@alist:matrix.orgyliceee changed their profile picture.20:02:26
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