pkgconfig.nix

{ compiler }:
{ packageOverrides = pkgs: {

    nginx = pkgs.nginx.override {
      modules = [ pkgs.nginxModules.moreheaders ];
    };

    ejabberd = pkgs.ejabberd.override {
      configureFlags = [ "pgsql" ];
    };

    haskell = pkgs.haskell // {
      packages = pkgs.haskell.packages // {
        "${compiler}" = pkgs.haskell.packages."${compiler}".override {
          overrides = hpNew: hpOld: rec {

            # A whole bunch of other Haskell packages here

            fakedata =
              hpNew.callPackage ./fakedata.nix {};
          };
        };
      };
    };
  };
  # TODO: amazonka is broken in nixos-19.09
  allowBroken = true;
  allowUnsupportedSystem = true; # currently for ejabberd on darwin
  allowUnfree = true;
}