let
  pkgs = import (builtins.fetchTarball {
    url = "https://github.com/NixOS/nixpkgs/archive/d0e1602ddde669d5beb01aec49d71a51937ed7be.tar.gz";
    sha256 = "0g0m7zhpnbgzwn4gmqhjvqd9v6d917p1dg3fk1kwxs2x7v7c1zd4";
  }) { };
in
{
  inherit pkgs;
  default = pkgs.callPackage ./package.nix { };
  libcxx = pkgs.pkgsLLVM.callPackage ./package.nix {
    boost = null; # fails to compile
  };
  musl = pkgs.pkgsStatic.callPackage ./package.nix { };
}