diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index f8c5fadb..e123b373 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -20,8 +20,8 @@ jobs:
         with:
           cache: poetry
 
-      - name: Install dependencies
-        run: poetry build
+      - name: Build package
+        run: make build
 
       - name: Publish a Python distribution to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 3156ff71..a8d724dc 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -33,7 +33,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Build package
-        run: poetry build
+        run: make build
 
   black:
     runs-on: ubuntu-latest
@@ -93,8 +93,5 @@ jobs:
           cache: poetry
           python-version: ${{ matrix.python-version }}
 
-      - name: Install dependencies
-        run: poetry install
-
       - name: Run tests
-        run: poetry run pytest
+        run: make test
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..649776e0
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,17 @@
+clean:
+	rm -rfv magnum_cluster_api/charts/cluster-autoscaler
+
+vendor: clean
+	helm repo add autoscaler https://kubernetes.github.io/autoscaler
+	helm repo update
+	helm fetch autoscaler/cluster-autoscaler --version 9.27.0 --untar --untardir magnum_cluster_api/charts
+	patch -p0 magnum_cluster_api/charts/cluster-autoscaler/templates/clusterrole.yaml < hack/add-omt-to-clusterrole.patch
+
+build: vendor
+	poetry build
+
+install: build
+	poetry install
+
+test: install
+	poetry run pytest
diff --git a/hack/build.py b/hack/build.py
deleted file mode 100755
index c91163f7..00000000
--- a/hack/build.py
+++ /dev/null
@@ -1,48 +0,0 @@
-import shutil
-import subprocess
-
-AUTOSCALER_HELM_REPO_NAME = "autoscaler"
-AUTOSCALER_HELM_REPO_URL = "https://kubernetes.github.io/autoscaler"
-AUTOSCALER_HELM_CHART = "cluster-autoscaler"
-AUTOSCALER_HELM_VERSION = "9.27.0"
-
-
-def setup_helm_repository(name, url):
-    subprocess.run(["helm", "repo", "add", name, url])
-    subprocess.run(["helm", "repo", "update"])
-
-
-def download_helm_chart(repo, chart, version):
-    shutil.rmtree(f"magnum_cluster_api/charts/{chart}", ignore_errors=True)
-    subprocess.run(
-        [
-            "helm",
-            "fetch",
-            f"{repo}/{chart}",
-            "--version",
-            version,
-            "--untar",
-            "--untardir",
-            "magnum_cluster_api/charts",
-        ]
-    )
-
-
-def download_autoscaler_chart():
-    setup_helm_repository(AUTOSCALER_HELM_REPO_NAME, AUTOSCALER_HELM_REPO_URL)
-    download_helm_chart(
-        AUTOSCALER_HELM_REPO_NAME, AUTOSCALER_HELM_CHART, AUTOSCALER_HELM_VERSION
-    )
-    with open("hack/add-omt-to-clusterrole.patch", "rb", 0) as fd:
-        subprocess.check_call(
-            [
-                "patch",
-                "-p0",
-            ],
-            cwd=f"magnum_cluster_api/charts/{AUTOSCALER_HELM_CHART}/templates",
-            stdin=fd,
-        )
-
-
-if __name__ == "__main__":
-    download_autoscaler_chart()
diff --git a/hack/stack.sh b/hack/stack.sh
index 37e4aa63..2ad81a78 100755
--- a/hack/stack.sh
+++ b/hack/stack.sh
@@ -114,6 +114,9 @@ clusterctl init \
 sudo curl -Lo /usr/local/bin/skopeo https://github.com/lework/skopeo-binary/releases/download/v1.10.0/skopeo-linux-amd64
 sudo chmod +x /usr/local/bin/skopeo
 
+# Vendor the chart
+make vendor
+
 # Install `magnum-cluster-api`
 pip install -U setuptools pip
 $HOME/.local/bin/pip3 install -e .
diff --git a/pyproject.toml b/pyproject.toml
index 302a9955..615d3a14 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,10 +24,6 @@ pytest-mock = "^3.6.1"
 requires = ["setuptools", "poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
-[tool.poetry.build]
-generate-setup-file = false
-script = "hack/build.py"
-
 [tool.poetry.scripts]
 magnum-cluster-api-image-builder = "magnum_cluster_api.cmd.image_builder:main"
 magnum-cluster-api-image-loader = "magnum_cluster_api.cmd.image_loader:main"