$ ng g ngrx
Cannot read property 'split' of undefined
TypeError: Cannot read property 'split' of undefined
    at Class.run (~\node_modules\@angular\cli\commands\generate.js:112:63)
    at resolve (~\node_modules\@angular\cli\ember-cli\lib\models\command.js:261:20)
    at Promise (<anonymous>)
    at Class.validateAndRun (~\node_modules\@angular\cli\ember-cli\lib\models\command.js:2
40:12)
    at Promise.resolve.then.then (~\node_modules\@angular\cli\ember-cli\lib\cli\cli.js:140
:24)
    at <anonymous>