Fix typo

Makefile

@@ -5,8 +5,7 @@ TAGS := $(SDK_VERSION)
 .PHONY: build
 build:
 	docker build --pull -t $(IMAGE):$(TAGS) . \
-	  --build-arg PLATFORM=$(PLATFORM) \
-	  --build-arg BUILD_TOOLS=$(BUILD_TOOLS)
+	  --build-arg SDK_VERSION=$(SDK_VERSION) \
 	docker tag $(IMAGE):$(TAGS) $(IMAGE):latest
 	@echo Successfully tagged $(IMAGE):$(TAGS) as latest