Gradle 6.0 requires extension functions to be placed inside plugins block
diff --git a/buildSrc/settings.gradle.kts b/buildSrc/settings.gradle.kts
index fa8ccb4..969c4e4 100644
--- a/buildSrc/settings.gradle.kts
+++ b/buildSrc/settings.gradle.kts
@@ -16,12 +16,9 @@
  *
  */
 
-val String.v: String get() = extra["$this.version"] as String
-
-fun PluginDependenciesSpec.idv(id: String) = id(id) version id.v
-
 pluginManagement {
     plugins {
+        fun PluginDependenciesSpec.idv(id: String) = id(id) version extra["$id.version"].toString()
         idv("com.diffplug.gradle.spotless")
     }
 }
diff --git a/settings.gradle.kts b/settings.gradle.kts
index bc8cdf5..9012a66 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -16,12 +16,10 @@
  *
  */
 
-val String.v: String get() = extra["$this.version"] as String
-
-fun PluginDependenciesSpec.idv(id: String) = id(id) version id.v
-
 pluginManagement {
     plugins {
+        fun PluginDependenciesSpec.idv(id: String) = id(id) version extra["$id.version"].toString()
+
         idv("com.diffplug.gradle.spotless")
         idv("com.github.spotbugs")
         idv("com.github.vlsi.crlf")