anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "mediastreamer2";
  -  version = "4.4.35";
  +  version = "4.5.1";
   
     src = fetchFromGitLab {
       domain = "gitlab.linphone.org";
  
positive.code: , libvpx
  , ortp
  , pkg-config
  , python
  , SDL
  , speex
  , srtp
  
negative.code:     doxygen
      intltool
      pkg-config
      python3
    ];
  
    propagatedBuildInputs = [
  