anchor.diff:    PCSC                    = [ CoreData ];
     PreferencePanes         = [];
     PubSub                  = [];
  -  Python                  = [ ApplicationServices ];
     QTKit                   = [ CoreMediaIO CoreMedia MediaToolbox QuickTime VideoToolbox ];
     QuickLook               = [ ApplicationServices CF ];
     QuickTime               = [ ApplicationServices AudioUnit Carbon CoreAudio CoreServices OpenGL QuartzCore ];
     Ruby                    = [];
  -  RubyCocoa               = [];
     SceneKit                = [];
     ScreenSaver             = [];
     Scripting               = [];
  
positive.code:   SystemConfiguration     = [ CF Security ];
    TWAIN                   = [ Carbon ];
    Tcl                     = [];
    Tk                      = [ ApplicationServices Carbon X11 ];
    VideoDecodeAcceleration = [ CF CoreVideo ];
    VideoToolbox            = [ CF CoreMedia CoreVideo ];
    WebKit                  = [ ApplicationServices Carbon JavaScriptCore OpenGL ];
    X11                     = []; # used by Tk, should this exist?
  
    # Umbrellas
    Accelerate          = [ CoreWLAN IOBluetooth ];
  
negative.code:   AppKitScripting         = [];
    AppleScriptKit          = [];
    AppleScriptObjC         = [];
    AudioToolbox            = [ AudioUnit CoreAudio CF CoreMIDI ];
    AudioUnit               = [ Carbon CoreAudio CF ];
    AudioVideoBridging      = [ Foundation ];
  