diff --git a/Makefile b/Makefile
index b55de6f3..ae0b217f 100644
--- a/Makefile
+++ b/Makefile
@@ -55,10 +55,10 @@ $(LAZY_DIR):
 	git clone --depth 1 $(LAZY_REPO) $@
 
 $(PYENV_DIR):
-	bash packages/pyenv.sh
+	command -v pyenv > /dev/null || bash packages/pyenv.sh
 
 $(POETRY_DIR):
-	python3 packages/poetry.py
+	command -v poetry > /dev/null || python3 packages/poetry.py
 
 config/nvim/.venv:
 	python3 -m venv $@