--- a/TauSpinner/Makefile
+++ b/TauSpinner/Makefile
@@ -30,7 +30,7 @@
 
 %.o: %.cxx
 	$(CC) $(CFLAGS) -c $< -o $@ -Iinclude \
-	-I$(PREFIX)/include                   \
+	-I../include                   \
 	-I$(LHAPDFLOCATION)/include
 
 %.o: %.f