diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 727ff5e..84ce2c9 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -38,7 +38,14 @@ jobs:
           rm -rf /var/lib/apt/lists/*
 
       - name: Install locked dependencies
-        run: npm ci
+        run: |
+          npm ci --include=optional
+          SHARP_ARM64_VERSION="$(node -p "require('./package-lock.json').packages['node_modules/@img/sharp-linux-arm64'].version")"
+          LIBVIPS_ARM64_VERSION="$(node -p "require('./package-lock.json').packages['node_modules/@img/sharp-libvips-linux-arm64'].version")"
+          npm install --no-save --package-lock=false \
+            "@img/sharp-linux-arm64@${SHARP_ARM64_VERSION}" \
+            "@img/sharp-libvips-linux-arm64@${LIBVIPS_ARM64_VERSION}"
+          node -e "import('sharp').then((sharp) => sharp.default({ create: { width: 1, height: 1, channels: 4, background: '#000' } }).png().toBuffer())"
 
       - name: Check patch formatting
         run: git diff --check HEAD^