anchor.diff:  #  jansson = callPackage ../development/libraries/jansson { };
   #
     jbig2dec = callPackage ../development/libraries/jbig2dec { };
  -#
  -#  jbigkit = callPackage ../development/libraries/jbigkit { };
  -#
  +
  +  jbigkit = callPackage ../development/libraries/jbigkit { };
  +
     jemalloc = callPackage ../development/libraries/jemalloc { };
   #
   #  jetty_gwt = callPackage ../development/libraries/java/jetty-gwt { };
  
positive.code: #
  #  libresample = callPackage ../development/libraries/libresample {};
  #
  #  librevenge = callPackage ../development/libraries/librevenge {};
  #
  #  librevisa = callPackage ../development/libraries/librevisa { };
  #
  
negative.code: #
  #  gsasl = callPackage ../development/libraries/gsasl { };
  #
    gsl = callPackage ../development/libraries/gsl { };
  #
  #  gsl_1 = callPackage ../development/libraries/gsl/gsl-1_16.nix { };
  #
  