def ruby_relative_path
      ruby_pathname = Pathname.new(ruby)
      bindir_pathname = Pathname.new(target_bin_dir)
      ruby_pathname.relative_path_from(bindir_pathname).to_s
    end
def ruby_relative_path
      ruby_pathname = Pathname.new(ruby)
      bindir_pathname = Pathname.new(target_bin_dir)
      ruby_pathname.relative_path_from(bindir_pathname).to_s
    end
Relative path from #target_bin_dir to #ruby. This is used to
 generate batch files for windows in a way that the package can be
 installed in a custom location. On Unix we don't support custom
 install locations so this isn't needed.