diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index da0d989..0f9c987 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -22,16 +22,17 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-          cache: pnpm
-
+      # Install pnpm first so other steps can safely reference it.
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
           version: 10
+          run_install: false
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
diff --git a/.github/workflows/preview.yml b/.github/workflows/preview.yml
index 6b9a71d..c9e9c33 100644
--- a/.github/workflows/preview.yml
+++ b/.github/workflows/preview.yml
@@ -11,6 +11,7 @@ env:
 
 on:
   pull_request:
+  workflow_dispatch:
 
 jobs:
   preview:
@@ -22,16 +23,16 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
 
-      - name: Setup Node
-        uses: actions/setup-node@v4
-        with:
-          node-version: 22
-          cache: pnpm
-
       - name: Setup pnpm
         uses: pnpm/action-setup@v4
         with:
           version: 10
+          run_install: false
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile