diff --git a/.github/workflows/flake-update.yml b/.github/workflows/flake-update.yml
index 6e62987..faa4fde 100644
--- a/.github/workflows/flake-update.yml
+++ b/.github/workflows/flake-update.yml
@@ -42,7 +42,7 @@ jobs:
 
                 wget --content-disposition "$DETERMINATE_URL"
               env:
-                DETERMINATE_URL: ${{ vars.DETERMINATE_URL }}
+                DETERMINATE_URL: ${{ env.DETERMINATE_URL }}
             - name: Git config
               run: |
                 git config user.name github-actions