--- old/make/Init.gmk	2016-01-24 09:55:22.923593052 +0100
+++ new/make/Init.gmk	2016-01-24 09:55:22.831593047 +0100
@@ -315,6 +315,7 @@
 
     # Support targets for COMPARE_BUILD, used for makefile development
     pre-compare-build:
+	$(call WaitForSmartJavacFinish)
 	$(call PrepareCompareBuild)
 
     post-compare-build: