--- old/make/launcher/Launcher-java.security.jgss.gmk	2019-02-05 16:27:53.746742155 +0100
+++ new/make/launcher/Launcher-java.security.jgss.gmk	2019-02-05 16:27:53.574742155 +0100
@@ -25,7 +25,7 @@
 
 include LauncherCommon.gmk
 
-ifeq ($(OPENJDK_TARGET_OS), windows)
+ifeq ($(call isTargetOs, windows), true)
   $(eval $(call SetupBuildLauncher, kinit, \
       MAIN_CLASS := sun.security.krb5.internal.tools.Kinit, \
   ))