diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 52f63c4..f116644 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -85,7 +85,7 @@ jobs:
       - name: env_isPrerelease
         run: |
             chcp 65001
-            $result = (${{steps.tag.outputs.tag}} -like "*beta*" -as [string]).ToLower()
+            $result = ("${{steps.tag.outputs.tag}}" -like "*beta*" -as [string]).ToLower()
             echo "isPrerelease=$result" >> $GITHUB_ENV
       - name: tree
         run: chcp 65001 && cmd /c tree ./build /F && echo ${{needs.publish_release.outputs.isPrerelease}}