anchor.diff:      sha256 = "071fj2jm5kydlz02ic5sylhmw6h2p3cgrm3gwdfabinqkqcv4jh4";
     };
     
  -  buildInputs = [perl XMLSimple];
  +  buildInputs = [perl XMLSimple librsvg];
   
     postInstall =
       ''
  
positive.code: {stdenv, fetchurl, perl, XMLSimple}:
  
  stdenv.mkDerivation rec {
    name = "icon-naming-utils-0.8.90";
  
negative.code:           --replace '/bin/perl' '/bin/perl -I${XMLSimple}/lib/perl5/site_perl'
      '';
  
    meta = with stdenv.lib; {
      homepage = http://tango.freedesktop.org/Standard_Icon_Naming_Specification;
      platforms = platforms.linux;
    };
  }
  