diff --git a/.github/workflows/base.yml b/.github/workflows/base.yml
index 290eeaf..07e5a8b 100644
--- a/.github/workflows/base.yml
+++ b/.github/workflows/base.yml
@@ -121,6 +121,11 @@ jobs:
           path: .tf-cli
       - run: echo "$GITHUB_WORKSPACE/.tf-cli/bin" >> "$GITHUB_PATH"
 
+      - name: Install uv
+        # Callers that package a python Lambda build it with `uv export` and
+        # `uv pip install`, run by terraform-aws-modules/lambda/aws during apply.
+        uses: astral-sh/setup-uv@20cfd1bf945f4377ade1205e4dbc17946fc9a30d # v10.0.1
+
       - name: Check formatting
         working-directory: ${{ inputs.working_directory }}
         run: terraform fmt --recursive -check