diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index d19bc0c..12467db 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -12,12 +12,47 @@ on:
 
 jobs:
   build:
+    if: github.event_name == 'pull_request' || steps.version-check.outputs.version_changed == 'true'
     runs-on: ubuntu-latest
 
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Check if version changed
+        id: version-check
+        run: |
+          # Get current version
+          CURRENT_VERSION=$(node -p "require('./package.json').version")
+          echo "Current version: $CURRENT_VERSION"
+
+          # Check if HEAD~1 exists (handle first commit)
+          if ! git rev-parse HEAD~1 &>/dev/null; then
+            echo "First commit detected, running workflow"
+            echo "version_changed=true" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Check if package.json exists in previous commit
+          if ! git show HEAD~1:package.json &>/dev/null; then
+            echo "package.json doesn't exist in previous commit"
+            echo "version_changed=true" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Extract previous version using grep/sed (safer than node for old file)
+          PREVIOUS_VERSION=$(git show HEAD~1:package.json | grep '"version"' | head -1 | sed -E 's/.*"version"\s*:\s*"([^"]+)".*/\1/')
+          echo "Previous version: $PREVIOUS_VERSION"
+
+          # Compare versions
+          if [ "$CURRENT_VERSION" != "$PREVIOUS_VERSION" ]; then
+            echo "Version changed: $PREVIOUS_VERSION -> $CURRENT_VERSION"
+            echo "version_changed=true" >> $GITHUB_OUTPUT
+          else
+            echo "Version unchanged: $CURRENT_VERSION"
+            echo "version_changed=false" >> $GITHUB_OUTPUT
+          fi
+
       - name: Read package.json version
         id: package-version
         run: |