diff --git a/.github/workflows/smoke.yml b/.github/workflows/smoke.yml
new file mode 100644
index 0000000..15c61ac
--- /dev/null
+++ b/.github/workflows/smoke.yml
@@ -0,0 +1,33 @@
+name: Smoke test
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read
+
+jobs:
+  config-build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v7
+
+      - name: Build fixture through the local action
+        id: sourcey
+        uses: ./
+        with:
+          version: "3.6.5"
+          config: test/fixture/sourcey.config.ts
+          output: test/fixture/generated docs
+
+      - name: Verify output
+        env:
+          OUTPUT_DIR: ${{ steps.sourcey.outputs.output-dir }}
+        run: |
+          test "$OUTPUT_DIR" = "test/fixture/generated docs"
+          test -f "$OUTPUT_DIR/index.html"
+          test -f "$OUTPUT_DIR/search-index.json"
diff --git a/action.yml b/action.yml
index 59ca1f9..98c3944 100644
--- a/action.yml
+++ b/action.yml
@@ -38,23 +38,31 @@ runs:
 
     - name: Install Sourcey
       shell: bash
-      run: npm install -g sourcey@${{ inputs.version }}
+      env:
+        SOURCEY_VERSION: ${{ inputs.version }}
+      run: npm install --no-save --package-lock=false "sourcey@$SOURCEY_VERSION"
 
     - name: Build docs
       id: build
       shell: bash
+      env:
+        INPUT_ARGS: ${{ inputs.args }}
+        INPUT_CONFIG: ${{ inputs.config }}
+        INPUT_OUTPUT: ${{ inputs.output }}
+        INPUT_SPEC: ${{ inputs.spec }}
       run: |
-        ARGS=""
-        if [ -n "${{ inputs.config }}" ]; then
-          ARGS="--config ${{ inputs.config }}"
-        elif [ -n "${{ inputs.spec }}" ]; then
-          ARGS="${{ inputs.spec }}"
+        ARGS=()
+        if [ -n "$INPUT_CONFIG" ]; then
+          ARGS+=(--config "$INPUT_CONFIG")
+        elif [ -n "$INPUT_SPEC" ]; then
+          ARGS+=("$INPUT_SPEC")
         fi
-        if [ -n "${{ inputs.output }}" ]; then
-          ARGS="$ARGS --output ${{ inputs.output }}"
+        if [ -n "$INPUT_OUTPUT" ]; then
+          ARGS+=(--output "$INPUT_OUTPUT")
         fi
-        if [ -n "${{ inputs.args }}" ]; then
-          ARGS="$ARGS ${{ inputs.args }}"
+        if [ -n "$INPUT_ARGS" ]; then
+          read -r -a EXTRA_ARGS <<< "$INPUT_ARGS"
+          ARGS+=("${EXTRA_ARGS[@]}")
         fi
-        sourcey build $ARGS
-        echo "output-dir=${{ inputs.output }}" >> "$GITHUB_OUTPUT"
+        "$GITHUB_WORKSPACE/node_modules/.bin/sourcey" build "${ARGS[@]}"
+        echo "output-dir=$INPUT_OUTPUT" >> "$GITHUB_OUTPUT"
diff --git a/test/fixture/openapi.yaml b/test/fixture/openapi.yaml
new file mode 100644
index 0000000..f0d7543
--- /dev/null
+++ b/test/fixture/openapi.yaml
@@ -0,0 +1,12 @@
+openapi: 3.1.0
+info:
+  title: Sourcey action fixture
+  version: 1.0.0
+paths:
+  /health:
+    get:
+      operationId: getHealth
+      summary: Check service health
+      responses:
+        "200":
+          description: The service is healthy
diff --git a/test/fixture/sourcey.config.ts b/test/fixture/sourcey.config.ts
new file mode 100644
index 0000000..56c1637
--- /dev/null
+++ b/test/fixture/sourcey.config.ts
@@ -0,0 +1,14 @@
+import { defineConfig, openapi } from "sourcey";
+
+export default defineConfig({
+  name: "Sourcey action fixture",
+  navigation: {
+    tabs: [
+      {
+        tab: "API Reference",
+        slug: "api",
+        source: openapi("./openapi.yaml"),
+      },
+    ],
+  },
+});