Error during the travis execution

[tdurieux]

Travis fails with this error, but I cannot find the location of the problematic code.

<set>:1: error: reference to javaHome is ambiguous;
it is imported twice in the same scope by
import _root_.blue.BlueBuild._
and import Keys._
javaHome in ThisBuild := Some(file("/usr/lib/jvm/java-7-oracle"))
^
[error] Type error in expression