Workaround for Guice Java 11 bug

build.sc

@@ -8,6 +8,24 @@ object shingle extends ScalaModule
   def mainClass = Some("net.okennedy.shingle.Shingle")
   def ammoniteVersion = "2.5.3"
 
+  def internalJavaVersion = T {
+    try {
+      val jvm = System.getProperties().getProperty("java.version")
+      println(f"Running Vizier with `${jvm}`")
+      jvm.split("\\.")(0).toInt
+    } catch {
+      case _:NumberFormatException | _:ArrayIndexOutOfBoundsException => 8
+    }
+  }
+
+  def forkArgs = T {
+    if(internalJavaVersion() >= 11){
+      Seq(
+        // Needed workaround for GUICE permissions bug (dependency in MQTT)
+        "--add-opens", "java.base/java.lang=ALL-UNNAMED"
+      )
+    } else { Seq[String]() }
+  }
 
   def ivyDeps = Agg(
     ivy"com.lihaoyi::ujson:2.0.0",