anchor.diff:  , qtquickcontrols
   , qtimageformats
   , qtxmlpatterns
  -, ffmpeg_3
  +, ffmpeg
   , guvcview
   , cmake
   , ninja
  
positive.code:     v4l-utils
      libv4l
      pcre
      ffmpeg_3
      guvcview
      qwt
    ];
  
negative.code:     grep -rl 'qwt' . | xargs sed -i 's@<qwt/qwt_slider.h>@<qwt_slider.h>@g'
    '';
  
    qtWrapperArgs = [
      "--prefix" "PATH" ":" (lib.makeBinPath [ ffmpeg ])
    ];
  
    meta = with lib; {
      homepage = "http://www.qstopmotion.org";
      description = "Create stopmotion animation with a (web)camera";
  