anchor.diff:    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; {
  
positive.code: 
    buildInputs = [
      cairo gdk_pixbuf libconfig pango pkgconfig xcbutilwm
      alsaLib wirelesstools asciidoc libxslt
    ];
  
    postPatch = ''
  
negative.code: { stdenv, fetchFromGitHub, cairo, gdk_pixbuf, libconfig, pango, pkgconfig
  , xcbutilwm, alsaLib, wirelesstools, asciidoc, libxslt, makeWrapper
  , configFile ? null, lib
  }:
  
  stdenv.mkDerivation rec {
  