fix makefile

Author: timburke-hackit

lambdas/icaseworks_api_ingestion/Makefile

@@ -5,6 +5,6 @@ install-requirements:
 	# the requirements are generated so that the packages
 	# could be downloaded and packaged up for the lambda
 
-	. venv/bin/activate && sudo pipenv lock --requirements > requirements.txt
+	. venv/bin/activate && sudo pipenv lock -r > requirements.txt
 	. venv/bin/activate && sudo pip install --target ./lib -r requirements.txt
 	rm -rf venv/