         NODE_ENV: 'production'
 
     clean:
-      derived: ['_build', 'javascripts', 'stylesheets', 'fonts', 'typings', '**.html']
+      derived: ['javascripts', 'stylesheets', 'fonts', 'html']
       options:
         force: true
 

      default:
        expand: true
        ext: '.html'
        src: ['*.pug', 'src/*.pug', 'partials/*.pug', '!partials/include/**']
        dest: '.'
        # The default extDot chops off more than the trailing .pug, e.g.:
        #   src/collections.view.pug -> public/collections.html
        # We want to preserve the filename up to .pug, e.g.:

      default:
        expand: true
        ext: '.html'
        cwd: 'src/'
        src: ['**/*.md']
        dest: 'html'

    stylus:
      options:
