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