anchor.diff:  
     ghostscript = callPackage ../misc/ghostscript {
       x11Support = false;
  -    cupsSupport = config.ghostscript.cups or (!stdenv.isDarwin);
  +    cupsSupport = config.ghostscript.cups or true;
     };
   
     ghostscriptX = appendToName "with-X" (ghostscript.override {
  
positive.code: 
    ctodo = callPackage ../applications/misc/ctodo { };
  
    cmake-2_8 = callPackage ../development/tools/build-managers/cmake/2.8.nix {
      wantPS = stdenv.isDarwin;
      inherit (darwin) ps;
    };
  
    cmake = callPackage ../development/tools/build-managers/cmake {
      wantPS = stdenv.isDarwin;
      inherit (darwin) ps;
    };
  
    cmakeCurses = cmake.override { useNcurses = true; };
  
  
negative.code: 
    libpqxx = callPackage ../development/libraries/libpqxx { };
  
    libproxy = callPackage ../development/libraries/libproxy { };
  
    libpseudo = callPackage ../development/libraries/libpseudo { };
  
  