My attempt to shade guava with coursier

build.sbt

import sbt.Keys._

lazy val commonSettings = Seq(
  name := "shading-issue",
  version := "0.1",
  scalaVersion in ThisBuild := "2.11.8"
)

lazy val `dummy` = (project in file("."))
    .settings(commonSettings: _*)
    .aggregate(`dummy-api`, `dummy-impl`)

    .enablePlugins(coursier.ShadingPlugin)
    .settings(
      coursier.ShadingPlugin.projectSettings,
      shadeNamespaces ++= Set(
        "google.shade"
      ),
      libraryDependencies ++= Seq(
        Dependencies.guava % "shaded",
        Dependencies.hadoopMiniDFSCluster % Test % "shaded",
        Dependencies.hadoopCommon % Test % "shaded"
      )
    )

lazy val `dummy-api` = (project in file("dummy-api"))
  .settings(
    libraryDependencies ++= Dependencies.`dummy-api`
  )

lazy val `dummy-impl` = (project in file("dummy-impl"))
  .enablePlugins(LagomScala)
  .settings(
    libraryDependencies ++= Dependencies.`dummy-impl`
  )
  .settings(lagomForkedTestSettings: _*)

  .enablePlugins(coursier.ShadingPlugin)
  .settings(
    coursier.ShadingPlugin.projectSettings,
    shadeNamespaces ++= Set(
      "google.shade"
    ),
    libraryDependencies ++= Seq(
      Dependencies.guava % "shaded",
      Dependencies.hadoopMiniDFSCluster % Test % "shaded",
      Dependencies.hadoopCommon % Test % "shaded"
    )
  )

  .dependsOn(`dummy-api`)

plugins.sbt

addSbtPlugin("com.lightbend.lagom" % "lagom-sbt-plugin" % "1.4.0-M3")

addSbtPlugin("io.get-coursier" % "sbt-shading" % "1.0.0")
addSbtPlugin("io.get-coursier" % "sbt-coursier" % "1.0.0")

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.3")

addSbtPlugin("org.xerial.sbt" % "sbt-pack" % "0.8.0")