anchor.diff:      babl
       cairo
       #exiv2
  -    ffmpeg_2
  +    ffmpeg
       gdk-pixbuf_unwrapped
       #gexiv2
       glib
  
positive.code:     "--${boolWt (jasper != null)}-jasper"
      "--without-graphviz"
      "--without-lua"
      "--${boolWt (ffmpeg_2 != null)}-libavformat"
      #"--${boolWt (v4l_lib != null)}-libv4l"
      "--without-libv4l"
      "--${boolWt (lcms2 != null)}-lcms"
  
negative.code: , babl
  , cairo
  , exiv2
  , ffmpeg
  , gdk-pixbuf_unwrapped
  , gexiv2
  , glib
  