diff --git a/src/Makefile b/src/Makefile
index cb4f7f9..2f111dc 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -2,18 +2,28 @@ include Makefile.o.dep
 
 libname=tito.a
 
+ifndef GLOBAL_WORKING_DIR
+GLOBAL_WORKING_DIR := $(shell pwd)/../..
+endif
+
+current_path := $(shell pwd)
+global_relative_working_dir := $(shell relative_path $(current_path) $(GLOBAL_WORKING_DIR))
+
+
+
 all: $(libname)
 
 $(libname): $(o)
 	$(AR) rcs $(libname) $(o)
 
 
+
 %.o: %.cpp
-	$(CXX) -c $(CXXFLAGS) -I../../pikotools $<
+	$(CXX) -c $(CXXFLAGS) -I$(GLOBAL_WORKING_DIR)/pikotools $<
 
 
 depend:
-	makedepend -Y. -I../../pikotools -f- *.cpp > Makefile.dep
+	makedepend -Y. -I$(global_relative_working_dir)/pikotools -f- *.cpp > Makefile.dep
 	echo -n "o = " > Makefile.o.dep
 	ls -1 *.cpp | xargs -I foo echo -n foo " " | sed -E "s/([^\.]*)\.cpp[ ]/\1\.o/g" >> Makefile.o.dep