Using group & tag to run tests

[DHarls17]

Is it possible to run command line test config of groups and tags? I'm currently using ./node_modules/.bin/nightwatch -c config/local.conf.js -e chrome --group bugs --tag mobileOnly and it's not working (appears to be looking for the mobileOnly tag in the bugs group). I would like to run a test for a folder, and tags which are in separate folders in the same command. Thanks