[NTG-context] [t-rst] inclusion into Minimals, i. e. installation using `./first-setup.sh --extras='t-rst'`

Dear Philipp and ConTeXt folks, what needs to be done, that the module t-rst [1] can be installed using the following command. $ ./first-setup.sh --extras="t-rst" (I. e. how can this module be included into the ConTeXt Minimals distribution?) Thanks, Paul [1] https://bitbucket.org/phg/context-rst