diff --git a/Makefile b/Makefile
index e3503a6..46cd0dc 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,8 @@
+.PHONY: all clean venv run format format-check lint mypy test dist reformat dev
+
+PYTHON := venv/bin/python
+PIP := venv/bin/pip
+
 all: run
 
 clean:
@@ -5,27 +10,32 @@ clean:
 
 venv:
 	python3 -m venv venv && \
-		venv/bin/pip install --upgrade pip setuptools && \
-		venv/bin/pip install --editable ".[dev]"
+		$(PIP) install --upgrade pip setuptools && \
+		$(PIP) install --editable ".[dev]"
 
 run: venv
 	venv/bin/flask --app scipaperloader --debug run
 
-format: venv
-	rm -rf venv
-	venv/bin/black . && venv/bin/isort .
+format:
+	venv/bin/black .
+	venv/bin/isort .
 
-format-check: venv
-	venv/bin/black --check . && venv/bin/isort --check .
+format-check:
+	venv/bin/black --check .
+	venv/bin/isort --check .
 
-lint: venv
+reformat: format lint
+
+lint:
 	venv/bin/flake8 .
 
-mypy: venv
-	venv/bin/mypy
+mypy:
+	venv/bin/mypy scipaperloader
 
-test: venv
+test:
 	venv/bin/pytest
 
-dist: venv format-check lint mypy test
-	venv/bin/pip wheel --wheel-dir dist --no-deps .
+dist: format-check lint mypy test
+	$(PIP) wheel --wheel-dir dist --no-deps .
+
+dev: clean venv