diff --git a/.gitea/workflows/build-apk.yml b/.gitea/workflows/build-apk.yml
index f67da30..010e7fd 100644
--- a/.gitea/workflows/build-apk.yml
+++ b/.gitea/workflows/build-apk.yml
@@ -11,6 +11,16 @@ jobs:
     container:
       image: ghcr.io/cirruslabs/flutter:3.38.10
     steps:
+      # The cirruslabs/flutter image has no Node.js; actions/checkout and
+      # actions/upload-artifact are JS actions that need `node` inside the job container.
+      - name: Install Node.js
+        run: |
+          set -eux
+          NODE_TGZ=$(curl -fsSL https://nodejs.org/dist/latest-v22.x/ | grep -oE 'node-v22\.[0-9]+\.[0-9]+-linux-x64\.tar\.xz' | sort -V | tail -1)
+          curl -fsSL "https://nodejs.org/dist/latest-v22.x/${NODE_TGZ}" -o /tmp/node.tar.xz
+          tar -xJf /tmp/node.tar.xz -C /usr/local --strip-components=1
+          node --version
+
       - name: Checkout
         uses: actions/checkout@v4