diff --git a/.forgejo/workflows/cleanup.yaml b/.forgejo/workflows/cleanup.yaml
index 77461a1..69921a7 100644
--- a/.forgejo/workflows/cleanup.yaml
+++ b/.forgejo/workflows/cleanup.yaml
@@ -19,7 +19,8 @@ jobs:
           ref: public
       - name: Render website
         run: |
-          echo "GITHUB_PR_NAME=$(grep -l ${{ github.sha }} previews/*/git_sha.txt | awk -F '/' '{print $2}')" >> $GITHUB_ENV
+          export GITHUB_PR_NAME=$(grep -l ${{ github.sha }} previews/*/git_sha.txt | awk -F '/' '{print $2}')
+          echo $GITHUB_PR_NAME >> $GITHUB_ENV
           rm -rf previews/$GITHUB_PR_NAME || true
           cd previews
           tree -d -H '.' -L 1 --noreport --charset utf-8 -T "Versions" -o index.html