   # Build optimized files
   grunt.registerTask "build", [
     "clean:release"
-    "clean:tmp"
     "concurrent:release"
     "concurrent:optimize"
     "clean:tmp"

          keepalive: true

    clean:
      dev: ["release"]
      release: ["release",]
      tmp: [ "release/tmp"]

    coffee:

  # Start server in preview mode
  grunt.registerTask "preview", [
    "clean:release"
    "concurrent:release"
    "concurrent:optimize"
    "clean:tmp"
