diff -r 2251ba078bec -r eb7ce841ccec make/bsd/makefiles/buildtree.make
--- a/make/bsd/makefiles/buildtree.make	Sat Oct 24 16:18:50 2020 +0800
+++ b/make/bsd/makefiles/buildtree.make	Sat Oct 24 16:43:47 2020 +0800
@@ -113,7 +113,7 @@
 endif
 endif
 
-ifeq ($(ENABLE_JFR),false)
+ifneq ($(ENABLE_JFR),true)
 ALWAYS_EXCLUDE_DIRS += -o -name jfr
 endif