Gruntfile or requirejs bug

error

Running "requirejs:dist" (requirejs) task
>> Error: Error: The "out" and "dir" options are incompatible. Use "out" if you are targeting a single file for for optimization, and "dir" if you want the appDir or baseUrl directories optimized.
>>     at Function.build.createConfig (xxx/node_modules/grunt-requirejs/node_modules/requirejs/bin/r.js:23730:19)
Warning: Task "requirejs:dist" failed. Use --force to continue.

grunfile.js

requirejs: {
    dist: {
        // Options: https://github.com/jrburke/r.js/blob/master/build/example.build.js
        options: {
            paths: {
                backbone : 'vendor/backbone-amd/backbone',
                bootstrap: 'vendor/bootstrap',
                underscore : 'vendor/underscore-amd/underscore',
                jquery: 'vendor/jquery/jquery',
                marionette : 'vendor/marionette/lib/core/amd/backbone.marionette',
                'backbone.wreqr': 'vendor/backbone.wreqr/lib/amd/backbone.wreqr',
                'backbone.babysitter': 'vendor/backbone.babysitter/lib/amd/backbone.babysitter',
                'backbone.routefilter': 'vendor/backbone.routefilter/src/backbone.routefilter',

                'hbs': 'vendor/require-handlebars-plugin/hbs',
                'i18nprecompile': 'vendor/require-handlebars-plugin/hbs/i18nprecompile',
                'json2': 'vendor/require-handlebars-plugin/hbs/json2',
                'handlebars': 'vendor/require-handlebars-plugin/handlebars'

            },
            shim: {
                jquery : {
                    exports : 'jQuery'
                },
                underscore : {
                    exports : '_'
                },
                bootstrap: {
                    deps: ['jquery'],
                    exports: 'jquery'
                },
                backbone : {
                    deps : ['jquery', 'underscore'],
                    exports : 'Backbone'
                },
                marionette:  {
                    deps: ['jquery', 'underscore', 'backbone', 'backbone.wreqr', 'backbone.babysitter'],
                    exports: 'Marionette'
                }
            },
            locale : 'fr_fr',
            hbs: {
                helperDirectory: './helpers/',
                i18nDirectory:   './i18n/'
            },
            dir: '.',
            modules: [
                //First set up the common build layer.
                {
                    //module names are relative to baseUrl
                    name: './common',
                    //List common dependencies here. Only need to list
                    //top level dependencies, "include" will find
                    //nested dependencies.
                    include: ['marionette',
                              'app'
                    ]
                },

                //Now set up a build layer for each page, but exclude
                //the common one. "exclude" will exclude nested
                //the nested, built dependencies from "common". Any
                //"exclude" that includes built modules should be
                //listed before the build layer that wants to exclude it.
                //"include" the appropriate "app/main*" module since by default
                //it will not get added to the build since it is loaded by a nested
                //require in the page*.js files.
                {
                    //module names are relative to baseUrl/paths config
                    name: './login',
                    include: ['login/loginapp'],
                    exclude: ['./common']
                }
            ]
        }
    }
}

grunt_server_result.js

Configuration is now:

  cssmin:
  { dist:
   { files:
      { '<%= yeoman.dist %>/styles/main.css':
         [ '.tmp/styles/{,*/}*.css',
           'app/styles/{,*/}*.css' ] } } }

  concat:
  { 'dist/scripts/vendor/modernizr.js': [ 'app/scripts/vendor/modernizr/modernizr.js' ],
  'dist/scripts/main.js': [ 'dist/scripts/main.js' ] }

  uglify:
  { 'dist/scripts/vendor/modernizr.js': 'dist/scripts/vendor/modernizr.js',
  'dist/scripts/main.js': 'dist/scripts/main.js',
  'dist/scripts/vendor/requirejs/require.js': 'app/scripts/vendor/requirejs/require.js' }

  requirejs:
  { dist:
   { options:
      { paths:
         { backbone: 'vendor/backbone-amd/backbone',
           bootstrap: 'vendor/bootstrap',
           underscore: 'vendor/underscore-amd/underscore',
           jquery: 'vendor/jquery/jquery',
           marionette: 'vendor/marionette/lib/core/amd/backbone.marionette',
           'backbone.wreqr': 'vendor/backbone.wreqr/lib/amd/backbone.wreqr',
           'backbone.babysitter': 'vendor/backbone.babysitter/lib/amd/backbone.babysitter',
           'backbone.routefilter': 'vendor/backbone.routefilter/src/backbone.routefilter',
           hbs: 'vendor/require-handlebars-plugin/hbs',
           i18nprecompile: 'vendor/require-handlebars-plugin/hbs/i18nprecompile',
           json2: 'vendor/require-handlebars-plugin/hbs/json2',
           handlebars: 'vendor/require-handlebars-plugin/handlebars' },
        shim:
         { jquery: { exports: 'jQuery' },
           underscore: { exports: '_' },
           bootstrap: { deps: [Object], exports: 'jquery' },
           backbone: { deps: [Object], exports: 'Backbone' },
           marionette: { deps: [Object], exports: 'Marionette' } },
        locale: 'fr_fr',
        hbs:
         { helperDirectory: './helpers/',
           i18nDirectory: './i18n/' },
        dir: '.',
        modules:
         [ { name: './common', include: [Object] },
           { name: './login',
             include: [Object],
             exclude: [Object] } ],
        name: 'main',
        out: 'dist/scripts/main.js',
        baseUrl: 'app/scripts',
        mainConfigFile: 'app/scripts/main.js' } } }