anchor.diff:  , enableSubversionRepository ? false
   , enableTomcatWebApplication ? false
   , enableMongoDatabase ? false
  +, enableInfluxDatabase ? false
   , catalinaBaseDir ? "/var/tomcat"
   , jobTemplate ? "systemd"
   , getopt
  
positive.code: { stdenv, fetchurl
  , ejabberd ? null, mysql ? null, postgresql ? null, subversion ? null, mongodb ? null, mongodb-tools ? null
  , enableApacheWebApplication ? false
  , enableAxis2WebService ? false
  , enableEjabberdDump ? false
  
negative.code:     ++ stdenv.lib.optional enablePostgreSQLDatabase postgresql
      ++ stdenv.lib.optional enableSubversionRepository subversion
      ++ stdenv.lib.optional enableMongoDatabase mongodb
      ++ stdenv.lib.optional enableMongoDatabase mongodb-tools
      ++ stdenv.lib.optional enableInfluxDatabase influxdb;
  
    meta = {
      description = "Automated deployment of mutable components and services for Disnix";
  