anchor.diff:      "-DWITH_SA_LEARN=${spamassassin}/bin/sa-learn"
       "-DWITH_BOGOFILTER=${bogofilter}/bin/bogofilter"
       "-DWITH_OPENLDAP=${openldap}"
  -    "-DWITH_GWEATHER4=ON"
     ];
   
     requiredSystemFeatures = [
  
positive.code: , intltool
  , fetchurl
  , libxml2
  , webkitgtk
  , highlight
  , pkg-config
  , gtk3
  
negative.code: , nspr
  , icu
  , libcanberra-gtk3
  , geocode-glib_2
  , cmark
  , bogofilter
  , gst_all_1
  