anchor.diff:      cp -v deploy/qgroundcontrol.desktop $out/share/applications
   
       mkdir -p $out/bin
  -    cp -v build/release/QGroundControl "$out/bin/"
  +    cp -v build/staging/QGroundControl "$out/bin/"
   
       mkdir -p $out/share/qgroundcontrol
       cp -rv resources/ $out/share/qgroundcontrol
  
positive.code:     owner = "mavlink";
      repo = pname;
      rev = "v${version}";
      sha256 = "14pk1vmcpg2cc5p100chbhnynclcwyqmyb2n2w11vvk0l2c9z1gz";
      fetchSubmodules = true;
    };
  
  
negative.code: 
  mkDerivation rec {
    pname = "qgroundcontrol";
    version = "4.1.1";
  
    qtInputs = [
      qtbase qtcharts qtlocation qtserialport qtsvg qtquickcontrols2
  