diff --git a/make_scripts_riscv/project.mk b/make_scripts_riscv/project.mk
index b2c94d6f..66c41c7b 100644
--- a/make_scripts_riscv/project.mk
+++ b/make_scripts_riscv/project.mk
@@ -187,7 +187,7 @@ all:
 ifeq ("$(OS)","Windows_NT")
 else
 ifeq ("$(CONFIG_CHIP_NAME)", "BL602")
-	@cd $(BL60X_SDK_PATH)/image_conf;python3 -m pip install -r requirements.txt; python3 flash_build.py $(PROJECT_NAME) $(CONFIG_CHIP_NAME)
+	@cd $(BL60X_SDK_PATH)/image_conf && python3 -m pip install -r requirements.txt && python3 flash_build.py $(PROJECT_NAME) $(CONFIG_CHIP_NAME)
 endif
 endif
 	@echo "Building Finish. To flash build output."