anchor.diff:  
     xsnow = callPackage ../games/xsnow { };
   
  -  xsokoban = callPackage ../games/xsokoban {
  -    inherit (xorg) libX11 xproto libXpm libXt;
  -  };
  +  xsokoban = callPackage ../games/xsokoban { };
   
     zandronum = callPackage ../games/zandronum { };
     zandronum-server = callPackage ../games/zandronum/server.nix { };
  
positive.code: 
    freeglut = callPackage ../development/libraries/freeglut { };
  
    freenect = callPackage ../development/libraries/freenect {
        inherit (xorg) libXi libXmu;
    };
  
    freetype = callPackage ../development/libraries/freetype { };
  
  
negative.code: 
    vnc2flv = callPackage ../tools/video/vnc2flv {};
  
    vncrec = callPackage ../tools/video/vncrec { };
  
    vobcopy = callPackage ../tools/cd-dvd/vobcopy { };
  
  