diff --git a/contrib/local-environment/Makefile b/contrib/local-environment/Makefile
index 5b43aba4..512e6fab 100644
--- a/contrib/local-environment/Makefile
+++ b/contrib/local-environment/Makefile
@@ -24,9 +24,9 @@ keycloak-%:
 
 .PHONY: kubernetes-up
 kubernetes-up:
-	cd kubernetes && make create-cluster
-	cd kubernetes && make deploy
+	make -C kubernetes create-cluster
+	make -C kubernetes deploy
 
 .PHONY: kubernetes-down
 kubernetes-down:
-	cd kubernetes && make delete-cluster
+	make -C kubernetes delete-cluster
diff --git a/contrib/local-environment/kubernetes/Makefile b/contrib/local-environment/kubernetes/Makefile
index 917207ac..55fe927b 100644
--- a/contrib/local-environment/kubernetes/Makefile
+++ b/contrib/local-environment/kubernetes/Makefile
@@ -63,4 +63,5 @@ helm-undeploy:
 # creates K8S manifest from helm chart
 .PHONY: helm-create-manifest
 helm-create-manifest: helm-init
-	helm template --namespace default oauth2-proxy-example . > oauth2-proxy-example-full.yaml
+	echo "# WARNING: This file is auto-generated by `make helm-create-manifest`! DO NOT EDIT MANUALLY!" > oauth2-proxy-example-full.yaml
+	helm template --namespace default oauth2-proxy-example . >> oauth2-proxy-example-full.yaml