anchor.diff:    # defined when liblinphone and linphone-desktop weren't separated yet, so some
     # of them might not be needed for liblinphone alone.
     buildInputs = [
  -    (python.withPackages (ps: [ ps.pystache ps.six ]))
  +    (python3.withPackages (ps: [ ps.pystache ps.six ]))
       bcg729
       bctoolbox
       belcard
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "liblinphone";
    version = "4.4.35";
  
    src = fetchFromGitLab {
      domain = "gitlab.linphone.org";
  
negative.code: , ortp
  , pango
  , pkg-config
  , python3
  , readline
  , soci
  , speex
  