Heroku在成功下载依赖项后无法找到符号

Question

尝试部署我的游戏时！ 2.2.1应用程序到Heroku，我收到以下错误与外部依赖：

[info] downloading http://blopker.github.com/maven-repo/ws/wamplay/wamplay_2.10/0.2.6-SNAPSHOT/wamplay_2.10-0.2.6-SNAPSHOT.jar ...
[info]  [SUCCESSFUL ] ws.wamplay#wamplay_2.10;0.2.6-SNAPSHOT!wamplay_2.10.jar (67ms)
[info] Done updating.
[info] Compiling 42 Scala sources and 7 Java sources to /tmp/scala_buildpack_build_dir/target/scala-2.10/classes...
[error] /tmp/scala_buildpack_build_dir/target/scala-2.10/src_managed/main/wamplay/controllers/routes.java:8: error: cannot find symbol
[error] public static final wamplay.controllers.ReverseWAMPlayServer WAMPlayServer = new wamplay.controllers.ReverseWAMPlayServer();

似乎无法在依赖项内部路由到静态方法？

实际上已下载依赖项，但编译失败。我正在使用Java版本1.7。