diff --git a/Makefile b/Makefile
index b589728..74078ec 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ ensure_env:
 	-@python3 -m venv .venv
 
 build:
-	$(PyTHON) -m pip install build 
+	$(PYTHON) -m pip install build 
 	$(PYTHON) -m build .
 
 install: