anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "mediastreamer2";
  -  version = "4.4.35";
  +  version = "4.5.1";
   
     src = fetchFromGitLab {
       domain = "gitlab.linphone.org";
  
positive.code:     group = "BC";
      repo = pname;
      rev = version;
      sha256 = "18qmg678m087k7qsaxwfcv2p875z2kpy91pqryiv955km40drl0g";
    };
  
    patches = [
  
negative.code:     doxygen
      intltool
      pkg-config
      python3
    ];
  
    propagatedBuildInputs = [
  