GroovyStarter, repsonsible for the basic setup when executing groovy from the commandline, has a ---conf option, which is optional and a system property groovy.starter.conf which can be used if no commandline option is given. In some cases it is needed to not to run the command using the default configuration or the possibly broken one at the commandline. For these cases it would be nice to be able to use a system property to override the original conf settings. Therefor I suggest the usage of the property groovy.conf.override to implement this.