anchor.diff:  
     omxplayer = callPackage ../applications/video/omxplayer { };
   
  -  oneteam = callPackage ../applications/networking/instant-messengers/oneteam {
  -    xulrunner = firefox-unwrapped;
  -  };
  +  oneteam = callPackage ../applications/networking/instant-messengers/oneteam { };
   
     openbox = callPackage ../applications/window-managers/openbox { };
   
  
positive.code: 
    icedtea7_web = callPackage ../development/compilers/icedtea-web {
      jdk = jdk7;
      xulrunner = firefox-unwrapped;
    };
  
    icedtea8_web = callPackage ../development/compilers/icedtea-web {
      jdk = jdk8;
      xulrunner = firefox-unwrapped;
    };
  
    icedtea_web = self.icedtea8_web;
  
negative.code:   pekwm = callPackage ../applications/window-managers/pekwm { };
  
    pencil = callPackage ../applications/graphics/pencil {
    };
  
    perseus = callPackage ../applications/science/math/perseus {};
  