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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.org149 Servers

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1 May 2026
@vegowotenks:matrix.orgVegOwOtenksThanks! I will try inputsFrom, I don't have any clue about the differences.15:12:54
@alexfmpe:matrix.orgalexfmpemy link should explain it15:15:50
@alexfmpe:matrix.orgalexfmpe* my link above explains them15:15:59
@alexfmpe:matrix.orgalexfmpeyou probably want the same for libllvm and libclang15:17:55
@alexfmpe:matrix.orgalexfmpe

can we improve the whole security_tool issue for mac builds?

https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/configuration-darwin.nix is littered with

  • dontCheck that, well, makes us not run tests
  • substituteInPlace System/X509/MacOS.hs --replace-fail security /usr/bin/security that breaks sandbox builds

I also run into it for some packages on darwin pkgsStatic builds somehow due to the iserv-proxy thing

statistics> [33 of 51] Compiling Statistics.Types ( Statistics/Types.hs, dist/build/Statistics/Types.o )
statistics> iserv-proxy: Uncaught exception ghc-internal:GHC.Internal.IO.Exception.IOException:
statistics>
statistics> /homeless-shelter/Library/Frameworks/Security.framework/Security: withBinaryFile: does not exist (No such file or directory)
statistics>
statistics> HasCallStack backtrace:
statistics>   ioError, called at libraries/ghc-internal/src/GHC/Internal/Foreign/C/Error.hs:291:5 in ghc-internal:GHC.Internal.Foreign.C.Error
statistics>
statistics> <no location info>: error: External interpreter terminated (1)
16:45:24
@alexfmpe:matrix.orgalexfmpe *

can we improve the whole security_tool issue for mac builds?

https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/configuration-darwin.nix is littered with

  • dontCheck that, well, makes us not run tests
  • substituteInPlace System/X509/MacOS.hs --replace-fail security /usr/bin/security that breaks sandbox builds

I also run into it for some packages on darwin pkgsStatic.haskellPackages builds somehow via iserv-proxy

statistics> [33 of 51] Compiling Statistics.Types ( Statistics/Types.hs, dist/build/Statistics/Types.o )
statistics> iserv-proxy: Uncaught exception ghc-internal:GHC.Internal.IO.Exception.IOException:
statistics>
statistics> /homeless-shelter/Library/Frameworks/Security.framework/Security: withBinaryFile: does not exist (No such file or directory)
statistics>
statistics> HasCallStack backtrace:
statistics>   ioError, called at libraries/ghc-internal/src/GHC/Internal/Foreign/C/Error.hs:291:5 in ghc-internal:GHC.Internal.Foreign.C.Error
statistics>
statistics> <no location info>: error: External interpreter terminated (1)
16:45:47
@alexfmpe:matrix.orgalexfmpehuh, wait, maybe that's not the same "security" ? hard to tell with case insensitive system16:47:08
20 May 2021
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