anchor.diff:  }:
   
   let
  -  version = "0.64.1";
  +  version = "0.64.2";
   
     ETL = stdenv.mkDerivation rec {
       name = "ETL-0.04.17";
   
       src = fetchurl {
          url = "mirror://sourceforge/synfig/${name}.tar.gz";
  -       sha256 = "13kpiswgcpsif9fwcplqr0405aqavqn390cjnivkn3pxv0d2q8iy";
  +       sha256 = "1i2m31y5hdwr365z3zmfh5p3zm4ga4l4yqrl1qrmjryqqzkw200l";
       };
     };
   
  
positive.code: 
    src = fetchurl {
         url = "mirror://sourceforge/synfig/${name}.tar.gz";
         sha256 = "0nl6vpsn5dcjd5qhbrmd0j4mr3wddvymkg9414m77cdpz4l8b9v2";
      };
  
    buildInputs = [
  
negative.code: 
      src = fetchurl {
         url = "mirror://sourceforge/synfig/synfig-${version}.tar.gz";
         sha256 = "04mx321z929ngl65hfc1hv5jw37wqbh8y2avmpvajagvn6lp3zdl";
      };
  
      patches = [ ./synfig-cstring.patch ];
  