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path: root/pkgs/development/haskell-modules/default.nix
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{ pkgs, stdenv, lib, haskellLib, ghc, all-cabal-hashes
, buildHaskellPackages
, compilerConfig ? (self: super: {})
, packageSetConfig ? (self: super: {})
, overrides ? (self: super: {})
, initialPackages ? import ./initial-packages.nix
, nonHackagePackages ? import ./non-hackage-packages.nix
, configurationCommon ? import ./configuration-common.nix
, configurationNix ? import ./configuration-nix.nix
, configurationArm ? import ./configuration-arm.nix
, configurationDarwin ? import ./configuration-darwin.nix
, configurationJS ? import ./configuration-ghcjs-9.x.nix
}:

let

  inherit (lib) extends makeExtensible;
  inherit (haskellLib) makePackageSet;

  haskellPackages = pkgs.callPackage makePackageSet {
    package-set = initialPackages;
    inherit stdenv haskellLib ghc extensible-self all-cabal-hashes;

    # Prevent `pkgs/top-level/release-attrpaths-superset.nix` from recursing here.
    buildHaskellPackages = buildHaskellPackages // { __attrsFailEvaluation = true; };
  };

  platformConfigurations = lib.optionals stdenv.hostPlatform.isAarch [
    (configurationArm { inherit pkgs haskellLib; })
  ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
    (configurationDarwin { inherit pkgs haskellLib; })
  ] ++ lib.optionals stdenv.hostPlatform.isGhcjs [
    (configurationJS { inherit pkgs haskellLib; })
  ]
  ;

  extensions = lib.composeManyExtensions ([
    (nonHackagePackages { inherit pkgs haskellLib; })
    (configurationNix { inherit pkgs haskellLib; })
    (configurationCommon { inherit pkgs haskellLib; })
  ] ++ platformConfigurations ++ [
    compilerConfig
    packageSetConfig
    overrides
  ]);

  extensible-self = makeExtensible (extends extensions haskellPackages);

in

  extensible-self