{ pkgs ? import sources.nixpkgs {
    overlays = [
      (import ./pkgs)
    ];
  }
, sources ? import ./nix/sources.nix
}:
let
  inherit (pkgs) haskellPackages;
in
{
  inherit (haskellPackages) sh;
  shell = haskellPackages.shellFor {
    packages = _: [
      haskellPackages.sh
    ];
    buildInputs = [
      pkgs.cabal-install
      pkgs.niv
      pkgs.ormolu
    ];
    withHoogle = true;
    withHaddock = true;
  };
}