diff --git a/Makefile b/Makefile
index 018c373..0a8609f 100644
--- a/Makefile
+++ b/Makefile
@@ -18,13 +18,13 @@ BUILD_BASE	= build
 FW_BASE		= firmware
 
 # base directory for the compiler
-XTENSA_TOOLS_ROOT ?= /opt/Espressif/crosstool-NG/builds/xtensa-lx106-elf/bin
+XTENSA_TOOLS_ROOT ?= ../esp-open-sdk/crosstool-NG/builds/xtensa-lx106-elf/bin
 
 # base directory of the ESP8266 SDK package, absolute
-SDK_BASE	?= /opt/Espressif/ESP8266_SDK
+SDK_BASE	?= ../esp-open-sdk/sdk
 
 # esptool.py path and port
-ESPTOOL		?= esptool.py
+ESPTOOL		?= ../esp-open-sdk/esptool/esptool.py
 ESPPORT		?= /dev/ttyUSB0
 
 # name for the target project