--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,7 @@ LIB_DIR = lib
 BIN_DIR = bin
 
 # Depenencies
-PERFUTILS=../PerfUtils
+PERFUTILS ?= ../PerfUtils
 INCLUDE=-I$(PERFUTILS)/include
 LIBS=$(PERFUTILS)/lib/libPerfUtils.a -lpcrecpp -pthread