diff --git a/.gitea/workflows/actions.yaml b/.gitea/workflows/actions.yaml
index 0f30514..5da55c1 100644
--- a/.gitea/workflows/actions.yaml
+++ b/.gitea/workflows/actions.yaml
@@ -24,9 +24,13 @@ jobs:
           } || {
             echo 'Release tag set correctly: ${{ steps.tag.outputs.version }}'; exit 0
           }
-      - name: Compare tag with existing package version
+      - name: Lookup tag within existing package versions
         run: |
-          true
+          curl -X 'GET' \
+            'https://code.spamasaurus.com/api/v1/packages/djpbessems/container/filestash-enterprise' \
+            -H 'accept: application/json' \
+            -H 'Authorization: token ${{ secrets.GIT_APIKEY }}' |
+          jq -r 'any(.[].version; . == "${{ steps.tag.outputs.version }}")'
 
   build_container:
     name: Container image