let
  pkgs = import <nixpkgs> { };

  ghc = with pkgs.haskell.lib;
    pkgs.ghc.withPackages (pkgs:
      with pkgs;
      [
        hlint
        (doJailbreak (markUnbroken
          (biohazard.overrideAttrs (_: { patches = [ ./biohazard.patch ]; }))))
      ]);
in pkgs.mkShell { buildInputs = [ ghc ]; }