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| -rw-r--r-- | doc/languages-frameworks/haskell.section.md | 13 |
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diff --git a/doc/languages-frameworks/haskell.section.md b/doc/languages-frameworks/haskell.section.md index c0dc741eabca..7677c366191f 100644 --- a/doc/languages-frameworks/haskell.section.md +++ b/doc/languages-frameworks/haskell.section.md @@ -1047,6 +1047,19 @@ As you can see, `packunused` finds out that although the testsuite component has no redundant dependencies the library component of `scientific-0.3.5.1` depends on `ghc-prim` which is unused in the library. +### Using hackage2nix with nixpkgs + +Hackage package derivations are found in the +[`hackage-packages.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/hackage-packages.nix) +file within `nixpkgs` and are used as the initial package set for +`haskellPackages`. The `hackage-packages.nix` file is not meant to be edited +by hand, but rather autogenerated by [`hackage2nix`](https://github.com/NixOS/cabal2nix/tree/master/hackage2nix), +which by default uses the [`configuration-hackage2nix.yaml`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/configuration-hackage2nix.yaml) +file to generate all the derivations. + +To modify the contents `configuration-hackage2nix.yaml`, follow the +instructions on [`hackage2nix`](https://github.com/NixOS/cabal2nix/tree/master/hackage2nix). + ## Other resources - The Youtube video [Nix Loves Haskell](https://www.youtube.com/watch?v=BsBhi_r-OeE) |