diff --git a/ivy/src/main/scala/sbt/IvyRetrieve.scala b/ivy/src/main/scala/sbt/IvyRetrieve.scala
index f453efb1f..14ad917fa 100644
--- a/ivy/src/main/scala/sbt/IvyRetrieve.scala
+++ b/ivy/src/main/scala/sbt/IvyRetrieve.scala
@@ -74,7 +74,7 @@ object IvyRetrieve {
       }: _*)
     def toCaller(caller: IvyCaller): Caller = {
       val m = toModuleID(caller.getModuleRevisionId)
-      val callerConfigurations = caller.getCallerConfigurations.toArray.toVector collect {
+      val callerConfigurations = caller.getCallerConfigurations.toVector collect {
         case x if nonEmptyString(x).isDefined => x
       }
       val ddOpt = Option(caller.getDependencyDescriptor)
@@ -128,16 +128,16 @@ object IvyRetrieve {
       case _        => dep.getResolvedId.getExtraAttributes
     })
     val isDefault = Option(dep.getDescriptor) map { _.isDefault }
-    val configurations = dep.getConfigurations(confReport.getConfiguration).toArray.toList
+    val configurations = dep.getConfigurations(confReport.getConfiguration).toList
     val licenses: Seq[(String, Option[String])] = mdOpt match {
-      case Some(md) => md.getLicenses.toArray.toVector collect {
+      case Some(md) => md.getLicenses.toVector collect {
         case lic: IvyLicense if Option(lic.getName).isDefined =>
           val temporaryURL = "http://localhost"
           (lic.getName, nonEmptyString(lic.getUrl) orElse { Some(temporaryURL) })
       }
       case _ => Nil
     }
-    val callers = dep.getCallers(confReport.getConfiguration).toArray.toVector map { toCaller }
+    val callers = dep.getCallers(confReport.getConfiguration).toVector map { toCaller }
     val (resolved, missing) = artifacts(moduleId, confReport getDownloadReports revId)
 
     new ModuleReport(moduleId, resolved, missing, status, publicationDate, resolver, artifactResolver,
diff --git a/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala b/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala
index 5052a46ef..049130132 100644
--- a/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala
+++ b/ivy/src/main/scala/sbt/ivyint/CachedResolutionResolveEngine.scala
@@ -57,7 +57,7 @@ private[sbt] class CachedResolutionResolveCache() {
     {
       log.debug(s":: building artificial module descriptors from ${md0.getModuleRevisionId}")
       // val expanded = expandInternalDependencies(md0, data, prOpt, log)
-      val rootModuleConfigs = md0.getConfigurations.toArray.toVector
+      val rootModuleConfigs = md0.getConfigurations.toVector
       directDependencies(md0) map { dd =>
         val arts = dd.getAllDependencyArtifacts.toVector map { x => s"""${x.getName}:${x.getType}:${x.getExt}:${x.getExtraAttributes}""" }
         log.debug(s"::: dd: $dd (artifacts: ${arts.mkString(",")})")
@@ -599,7 +599,7 @@ private[sbt] trait CachedResolutionResolveEngine extends ResolveEngine {
           case None => Vector()
         }
       // These are the configurations from the original project we want to resolve.
-      val rootModuleConfs = md0.getConfigurations.toArray.toVector
+      val rootModuleConfs = md0.getConfigurations.toVector
       val configurations0 = ur.configurations.toVector
       // This is how md looks from md0 via dd's mapping.
       val remappedConfigs0: Map[String, Vector[String]] = Map(rootModuleConfs map { conf0 =>
diff --git a/ivy/src/main/scala/sbt/ivyint/MergeDescriptors.scala b/ivy/src/main/scala/sbt/ivyint/MergeDescriptors.scala
index 4e2cb1fc2..76bb4d2af 100644
--- a/ivy/src/main/scala/sbt/ivyint/MergeDescriptors.scala
+++ b/ivy/src/main/scala/sbt/ivyint/MergeDescriptors.scala
@@ -109,7 +109,7 @@ private final class MergedDescriptors(a: DependencyDescriptor, b: DependencyDesc
   private[this] def addConfigurations(dd: DefaultDependencyArtifactDescriptor, confs: Seq[String]): Unit =
     confs foreach dd.addConfiguration
 
-  private[this] def concat[T: reflect.ClassTag](a: Array[T], b: Array[T]): Array[T] = (a ++ b).distinct.toArray
+  private[this] def concat[T: reflect.ClassTag](a: Array[T], b: Array[T]): Array[T] = (a ++ b).distinct
 
   def getAllExcludeRules = concat(a.getAllExcludeRules, b.getAllExcludeRules)