lsyncd: migrate to use darwin.sourceRelease

  docbook_xml_dtd_45,

  docbook_xsl,

  libxslt,

  apple-sdk,

  pkgs,

}:

let

  xnu = apple-sdk.sourceRelease "xnu";

  f =

    pkgs: prev:

    if !pkgs.stdenv.hostPlatform.isDarwin || pkgs.stdenv.name == "bootstrap-stage0-stdenv-darwin" then

      prev.darwin.sourceRelease

    else

      f pkgs.stdenv.__bootPackages pkgs;

  bootstrapSourceRelease = f pkgs pkgs;

  # TODO(reckenrode): Use `sourceRelease` after migration has been merged and all releases updated to the same version.

  xnu = bootstrapSourceRelease "xnu";

in

stdenv.mkDerivation rec {

  pname = "lsyncd";