diff --git a/Makefile b/Makefile
index 7af5f62..9e82b6e 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@ CFLAGS=
 OBJ = ffi_nif.o
 TARGET = ffi_nif.so
 LIBS += -ldl -lffi
-ERTS_INCLUDE_PATH=/home/josh/Playground/erlangs/erts-6.0/include
+ERTS_INCLUDE_PATH ?=$(REBAR_PLT_DIR)/erts-6.0/include
 DIR=c_src
 
 $(DIR)/%.o: $(DIR)/%.c $(DEPS)