stdenv is not allowed to refer to linux-headers-4.4.10

  nixpkgsFn = import sources.nixpkgs;
  pkgsGlibc2_24 = nixpkgsFn {
    overlays = [
      overlay
      rjg-overlay
      (self: super: {
        gcc = pkgs16_09.gcc // { targetPrefix = ""; };
        inherit (pkgs16_09) glibc linuxHeaders;
      })
    ];
  };