Also use separte buildSrc build dir for intellij

build.gradle

@@ -176,7 +176,6 @@ allprojects {
   }
   idea {
     module {
-      // same as for the IntelliJ Gradle tooling integration
       inheritOutputDirs = false
       outputDir = file('build-idea/classes/main')
       testOutputDir = file('build-idea/classes/test')

buildSrc/build.gradle

@@ -76,6 +76,14 @@ extraArchive {
   tests = false
 }
 
+idea {
+  module {
+    inheritOutputDirs = false
+    outputDir = file('build-idea/classes/main')
+    testOutputDir = file('build-idea/classes/test')
+  }
+}
+
 eclipse {
   classpath {
     defaultOutputDir = file('build-eclipse')