anchor.diff:      ++ stdenv.lib.optional enableMySQLDatabase mysql.out
       ++ stdenv.lib.optional enablePostgreSQLDatabase postgresql
       ++ stdenv.lib.optional enableSubversionRepository subversion
  -    ++ stdenv.lib.optional enableMongoDatabase mongodb;
  +    ++ stdenv.lib.optional enableMongoDatabase mongodb
  +    ++ stdenv.lib.optional enableMongoDatabase mongodb-tools;
   
     meta = {
       description = "Automated deployment of mutable components and services for Disnix";
  
positive.code: assert enablePostgreSQLDatabase -> postgresql != null;
  assert enableSubversionRepository -> subversion != null;
  assert enableEjabberdDump -> ejabberd != null;
  assert enableMongoDatabase -> mongodb != null;
  
  stdenv.mkDerivation {
    name = "dysnomia-0.4";
  
negative.code: { stdenv, fetchurl
  , ejabberd ? null, mysql ? null, postgresql ? null, subversion ? null, mongodb ? null, mongodb-tools ? null
  , enableApacheWebApplication ? false
  , enableAxis2WebService ? false
  , enableEjabberdDump ? false
  