anchor.diff:    freetds = callPackage ../development/libraries/freetds { };
   
     frescobaldi = callPackage ../misc/frescobaldi {};
  -  
  +
     ftgl = callPackage ../development/libraries/ftgl { };
   
     ftgl212 = callPackage ../development/libraries/ftgl/2.1.2.nix { };
  
positive.code:   pdfread = callPackage ../tools/graphics/pdfread { };
  
    briss = callPackage ../tools/graphics/briss { };
   
    brickd = callPackage ../servers/brickd { 
      libusb = libusb1; 
    };
  
    bully = callPackage ../tools/networking/bully { };
  
negative.code:   eggDerivation = callPackage ../development/compilers/chicken/eggDerivation.nix { };
  
    chicken = callPackage ../development/compilers/chicken {
      bootstrap-chicken = chicken.override { bootstrap-chicken = null; };
    };
  
    egg2nix = callPackage ../development/tools/egg2nix {
  