anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "libportal";
  -  version = "0.3";
  +  version = "0.4";
   
     outputs = [ "out" "dev" "devdoc" ];
   
  
positive.code: { lib, stdenv
  , fetchFromGitHub
  , fetchpatch
  , meson
  , ninja
  , pkg-config
  
negative.code:     owner = "flatpak";
      repo = pname;
      rev = version;
      sha256 = "fuYZWGkdazq6H0rThqpF6KIcvwgc17o+CiISb1LjBso=";
    };
  
    nativeBuildInputs = [
      meson
  