diff --git a/Makefile b/Makefile
index 95a76e9f..35840544 100644
--- a/Makefile
+++ b/Makefile
@@ -6,8 +6,7 @@ _GID ?= 10001
 
 VENV := $(shell echo $${VIRTUAL_ENV-.venv})
 INSTALL_STAMP = $(VENV)/.install.stamp
-DOTENV_FILE = ".env"
-POETRY_VIRTUALENVS_IN_PROJECT = true
+DOTENV_FILE = .env
 
 .PHONY: help
 help:
@@ -16,6 +15,7 @@ help:
 	@echo "JBI make rules:"
 	@echo ""
 	@echo "Local"
+	@echo "  clean         - clean local cache folders"
 	@echo "  format        - run formatters (black, isort), fix in place"
 	@echo "  lint          - run linters"
 	@echo "  start         - run the API service locally"
@@ -28,10 +28,16 @@ help:
 	@echo ""
 	@echo "  help          - see this text"
 
+.PHONY: clean
+clean:
+	find . -name "__pycache__" | xargs rm -rf
+	rm -rf .mypy_cache .pytest_cache .coverage .venv
+
+
 install: $(INSTALL_STAMP)
 $(INSTALL_STAMP): poetry.lock
 	@if [ -z $(shell command -v poetry 2> /dev/null) ]; then echo "Poetry could not be found. See https://python-poetry.org/docs/"; exit 2; fi
-	poetry install --no-root
+	POETRY_VIRTUALENVS_IN_PROJECT=1 poetry install --no-root
 	touch $(INSTALL_STAMP)
 
 .PHONY: build
@@ -53,7 +59,7 @@ start: $(INSTALL_STAMP) $(DOTENV_FILE)
 	poetry run python -m src.app.api
 
 $(DOTENV_FILE):
-	cp -n .env.example $(DOTENV_FILE)
+	cp .env.example $(DOTENV_FILE)
 
 .PHONY: docker-shell
 docker-shell: $(DOTENV_FILE)