diff --git a/Makefile b/Makefile
index 38879cc..6e78eeb 100644
--- a/Makefile
+++ b/Makefile
@@ -20,6 +20,7 @@ OBJS = $(SRCS:.cc=.o)
 MODULE_big = plv8-$(PLV8_VERSION)
 EXTENSION = plv8
 PLV8_DATA = plv8.control plv8--$(PLV8_VERSION).sql
+USE_SYSTEM_V8 = 0
 
 
 # Platform detection
@@ -41,6 +42,7 @@ PGXS := $(shell $(PG_CONFIG) --pgxs)
 PG_VERSION_NUM := $(shell cat `$(PG_CONFIG) --includedir-server`/pg_config*.h \
 		   | perl -ne 'print $$1 and exit if /PG_VERSION_NUM\s+(\d+)/')
 
+ifeq ($(USE_SYSTEM_V8),0)
 AUTOV8_DIR = build/v8
 AUTOV8_OUT = build/v8/out.gn/obj
 AUTOV8_STATIC_LIBS = -lv8_libplatform -lv8_libbase
@@ -66,6 +68,7 @@ v8:
 	make -f Makefiles/Makefile.macos v8
 endif
 endif
+endif
 
 # enable direct jsonb conversion by default
 CCFLAGS += -DJSONB_DIRECT_CONVERSION
@@ -83,6 +86,7 @@ ifdef BIGINT_GRACEFUL
 endif
 
 
+ifeq ($(USE_SYSTEM_V8),0)
 # We're gonna build static link.  Rip it out after include Makefile
 SHLIB_LINK := $(filter-out -lv8, $(SHLIB_LINK))
 
@@ -101,6 +105,7 @@ else
 		SHLIB_LINK += -lrt -std=c++14 
 	endif
 endif
+endif
 
 DATA = $(PLV8_DATA)
 ifndef DISABLE_DIALECT
-- 
2.37.3