   grunt.registerTask 'build-dev', 'Development build', ->
     grunt.config.set 'minispade.options.stringModule', true
     grunt.task.run [
+      # Cleaning
+      'clean:dev'
+
       # Webapp
       'compass:webapp'
       'concat:webapp_css'

      options:
        report: "min"
        compress: true
        mangle:
          except: ['Vosae', 'Ember', 'Em']
      webapp_js_vendor:
        options:
          compress: false

        WEBAPP_SASS_DIR
        WEBAPP_CSS_DIR
      ]
      dev: [
        WEBAPP_TMP_DIR
      ]

    # 
    # Images minification
