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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.org143 Servers

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30 Jul 2025
@qyliss:fairydust.spaceAlyssa RossI think you're confused — you asked how to find merges of staging into staging-next. That's a PR to merge staging-next into master. New commits can still be added to it, as long as they don't cause mass rebuilds on Hydra.12:48:40
@bkl:matrix.orgdanaAh, I see. I guess I thought staging-next is created alongside a PR to release/master and only fixes are merged into it. Thanks!12:52:40
@qyliss:fairydust.spaceAlyssa RossStaging is merged into staging-next, and then a staging-next to master PR is opened. New commits can still be added to staging-next after that as long as they don't cause rebuilds, or, rarely, if the rebuilds are judged to be worth it.12:54:52
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31 Jul 2025
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@sternenseemann:systemli.orgsterni (he/him)First proper eval of Stackage LTS 24 / ghc 9.10.2 https://hydra.nixos.org/eval/1817278?compare=181717011:21:36
@kephaspierre:matrix.orgPierre Thierry I'm kephas on Github 13:51:39
1 Aug 2025
@lowtex:matrix.org_low_ changed their display name from low to _low_.21:06:04
2 Aug 2025
@magic_rb:matrix.redalder.orgmagic_rb is there a way to get a more minimal haskell bin out of nixpkgs? basic things end up being 3GB in closure size because they pull in GHC through primitive. I've yet to try static builds but that takes ages so isnt really scalable 10:37:25
@maralorn:maralorn.demaralorn @magic_rb:matrix.redalder.org: Have a look at justStaticExecutables in the nixpkgs manual. 11:17:00
@magic_rb:matrix.redalder.orgmagic_rbthanks11:18:12
@maralorn:maralorn.demaralornEven nicer but minimally more complicated ist enableSeparateBinOutput.11:19:16
@magic_rb:matrix.redalder.orgmagic_rboh my so much better11:21:32
@magic_rb:matrix.redalder.orgmagic_rb3GB to 64MB11:21:36
@magic_rb:matrix.redalder.orgmagic_rbthanks a lot11:21:37
@magic_rb:matrix.redalder.orgmagic_rb nice, enableSeparateBinOutput also just works 11:22:47
@magic_rb:matrix.redalder.orgmagic_rb this makes haskell acceptable for the usecase i wanted. (reimplementing environment.etc and i dont feel like doing it with a shell script, rather gonna write a haskell binary) 11:23:20
@emilazy:matrix.orgemily
In reply to @magic_rb:matrix.redalder.org
this makes haskell acceptable for the usecase i wanted. (reimplementing environment.etc and i dont feel like doing it with a shell script, rather gonna write a haskell binary)
you know about system.etc.overlay right?
11:25:11
@magic_rb:matrix.redalder.orgmagic_rbthis is not for nixos11:25:18
@magic_rb:matrix.redalder.orgmagic_rb rather nixng, i need environment.etc for nixos compatibility reasons 11:25:35
@emilazy:matrix.orgemilyyeah I just mean11:25:44
@emilazy:matrix.orgemilyyou should just crib that implementation11:25:51
@emilazy:matrix.orgemilyit's much better than the Perl nonsense11:25:59
@emilazy:matrix.orgemilyand pretty generic11:26:06
@magic_rb:matrix.redalder.orgmagic_rboverlays dont work in containers11:26:07
@magic_rb:matrix.redalder.orgmagic_rbso its not useful11:26:12
@emilazy:matrix.orgemilythey should in a mount namespace?11:26:22
@magic_rb:matrix.redalder.orgmagic_rb if you docker run it wont 11:26:35
@magic_rb:matrix.redalder.orgmagic_rbim pretty sure11:26:43

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