anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "evolution";
  -  version = "3.44.4";
  +  version = "3.45.1";
   
     src = fetchurl {
       url = "mirror://gnome/sources/evolution/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "8LFuerrTx5RaKcMi8X2rSgjWHpm9fMkbjfNQU8XBLow=";
  +    sha256 = "/iRZq5DdZ86JdtWuu6ekP69gqvBJMeTWnxxG10ensW4=";
     };
   
     nativeBuildInputs = [
  
positive.code:     "-DWITH_SA_LEARN=${spamassassin}/bin/sa-learn"
      "-DWITH_BOGOFILTER=${bogofilter}/bin/bogofilter"
      "-DWITH_OPENLDAP=${openldap}"
      "-DWITH_GWEATHER4=ON"
    ];
  
    requiredSystemFeatures = [
  
negative.code: , intltool
  , fetchurl
  , libxml2
  , webkitgtk_4_1
  , highlight
  , pkg-config
  , gtk3
  