Haskell: Difference between revisions

Haskell (view source)

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 == Introduction ==
 [https://www.srid.ca/haskell-nix '''Nix recipes for Haskellers'''] aims to get a beginner comfortable managing simple Haskell programs and projects using Nix.
 == FAQ and resources ==
+* [https://haskell4nix.readthedocs.io/ The official documentation] (the [https://nixos.org/manual/nixpkgs/stable/#haskell manual] directly points to this ressource)
 * [https://discourse.nixos.org/t/haskellpackages-stm-containers-fails-to-build/5416/4?u=srid '''How are Haskell packages managed in nixpkgs?''']
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 There are multiples ways to develop in Haskell on Nix depending on the simplicity of the project and on whether one want to benefit from the reproducibility offered by nix or not.
+Note that in the following, <code>haskellPackages</code> is a synonym of <code>haskell.packages.ghcXYZ</code> where <code>XYZ</code> is the current default version of GHC in nixpkgs. However you can use a different version by replacing <code>haskellPackages</code> with the wanted package, for instance use <code>haskell.packages.ghc884</code> to use GHC 8.8.4. You can get the full list of available GHC versions using:
+<syntaxhighlight lang="bash">
+$ nix-env -f "<nixpkgs>" -qaP -A haskell.compiler
+haskell.compiler.ghc8107                 ghc-8.10.7
+haskell.compiler.ghc884                  ghc-8.8.4
+haskell.compiler.ghc902                  ghc-9.0.2
+haskell.compiler.ghc924                  ghc-9.2.4
+haskell.compiler.ghcHEAD                 ghc-9.3.20220406
+haskell.compiler.ghc942                  ghc-9.4.2
+…
+</syntaxhighlight>
 === Scripting ===