Scala 在sbt concat in play framework 2中使用通配符

我对sbt concat在play framework 2中的集成有疑问

我使用的是sbt concat 0.1.8

我想要连接的文件位于“javascripts/libs/jquery/jqueryui/theme/smoothness/jqueryui.css”中

这是我的身材

name := """training-play"""

version := "1.0-SNAPSHOT"

lazy val root = (project in file(".")).enablePlugins(PlayScala)

scalaVersion := "2.11.1"

libraryDependencies ++= Seq(
  jdbc,
  "mysql" % "mysql-connector-java" % "5.1.33",
  "com.typesafe.slick" %% "slick" % "2.1.0",
  cache,
  ws
)

Concat.groups := Seq(
  "libs.css" -> group(((resourceDirectory in Assets).value / "javascripts" / "libs" / "jquery" / "jquery-ui" / "theme" / "smoothness") * "*.css"),
  "libs2.css" -> group(Seq("javascripts/libs/jquery/jquery-ui/theme/smoothness/jquery-ui.css"))
)

lazy val hello = taskKey[Unit]("Prints 'Hello World'")

hello := println("hello world!"+(((resourceDirectory in Assets).value / "javascripts" / "libs" / "jquery" / "jquery-ui" / "theme" / "smoothness") * "*.css"))


pipelineStages in Assets := Seq(concat)

“hello”任务向我显示我的PathFinder指向了正确的文件，但是从未创建libs.css文件（libs2.css工作正常）

有人知道如何使它正确工作吗