添加：~/.sbt/repositories 文件

文件内容：

[repositories]

local

my-maven-repo: http://maven.aliyun.com/nexus/content/groups/public/

官方Document看这里：http://www.scala-sbt.org/0.13.2/docs/Detailed-Topics/Library-Management.html#override-all-resolvers-for-all-builds