Why does the / sbt activator add a version of Scala to pure Java library dependencies?

Question

I use Activator Configuration in the latest version (1.2.8 with Scala 2.11.x).

When I add a dependency "org.apache.httpcomponents" %% "httpclient" % "4.4-alpha1"to my project in build.sbt, something like this:

libraryDependencies ++= Seq(
  "com.typesafe.akka" %% "akka-actor" % "2.3.4",
  "com.typesafe.akka" %% "akka-testkit" % "2.3.4",
  "org.scalatest" %% "scalatest" % "2.1.6" % "test",
  "junit" % "junit" % "4.11" % "test",
  "com.novocode" % "junit-interface" % "0.10" % "test",
  "org.apache.httpcomponents" %% "httpclient" % "4.4-alpha1" // my added dependency
)

... and try updating the project (in the cli activator). I get an error message:

[error] (*:update) sbt.ResolveException: unresolved dependency: org.apache.httpcomponents#httpclient_2.11;4.4-alpha1: not found

I know that the Scala version is not binary compatible, but I'm trying to get a clean java library org.apache.httpcomponent#httpclient! Why does the activator add "_2.11" to the end of artifactId and make the wrong URL ...? How to solve it?

Answer 1

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