anchor.diff:  
     buildInputs = [
       cairo gdk_pixbuf libconfig pango pkgconfig xcbutilwm
  -    alsaLib wirelesstools asciidoc libxslt
  +    alsaLib wirelesstools asciidoc libxslt makeWrapper
     ];
   
     postPatch = ''
  
positive.code: { stdenv, fetchFromGitHub, cairo, gdk_pixbuf, libconfig, pango, pkgconfig
  , xcbutilwm, alsaLib, wirelesstools, asciidoc, libxslt
  }:
  
  stdenv.mkDerivation rec {
  
negative.code:   postInstall = ''
      mkdir -p $out/share/yabar/examples
      cp -v examples/*.config $out/share/yabar/examples
  
      ${lib.optionalString (configFile != null)
        ''
          wrapProgram "$out/bin/yabar" \
            --add-flags "-c ${configFile}"
        ''
      }
    '';
  
    meta = with stdenv.lib; {
  