{
  pkgs ? import <nixpkgs> {},
  hc ? "ghc923"
}:

pkgs.stdenv.mkDerivation rec {
  name = "aoc-2022";
  buildInputs = [
    pkgs.haskell.compiler.${hc}
    pkgs.haskellPackages.split
    pkgs.git
    pkgs.zlib
    pkgs.cabal-install
    pkgs.pkgconfig
    pkgs.which
  ];
  shellHook = ''
    export LD_LIBRARY_PATH=${pkgs.lib.makeLibraryPath buildInputs}:$LD_LIBRARY_PATH
    export LANG=en_US.UTF-8
  '';
  LOCALE_ARCHIVE =
    if pkgs.stdenv.isLinux
    then "${pkgs.glibcLocales}/lib/locale/locale-archive"
    else "";
  src = ./.;

  # This currently doesn't work yet.
  buildPhase = ''
    export HOME=$TMP
    mkdir -p $TMP/.cabal $out/bin
    cp cabal.config $TMP/.cabal/config
    cabal build
    ln -s dist-newstyle/build/x86_64-linux/ghc-9.2.4/aoc2022-0.1.0.0/x/aoc2022/build/aoc2022/aoc2022 $out/bin/aoc2022
  '';
        
}