diff --git a/main/src/main/scala/sbt/Defaults.scala b/main/src/main/scala/sbt/Defaults.scala
index 90988dcca..274c7d21a 100755
--- a/main/src/main/scala/sbt/Defaults.scala
+++ b/main/src/main/scala/sbt/Defaults.scala
@@ -2138,7 +2138,11 @@ object Classpaths {
       val defaultIvyCache = bootIvyHome(appConfiguration.value)
       if (old != coursier.cache.CacheDefaults.location) old
       else if (ip.ivyHome == defaultIvyCache) old
-      else ip.ivyHome.getOrElse(old)
+      else
+        ip.ivyHome match {
+          case Some(home) => home / "coursier-cache"
+          case _          => old
+        }
     },
     dependencyCacheDirectory := {
       val st = state.value