diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index cd13906..cea0cb1 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -6,12 +6,14 @@ on:
       - master
 
 env:
-  REGISTRY: ${{ gitea.actor != '' && 'git.froth.zone' || 'ghcr.io' }}
+  REGISTRY: ${{ github.api_url != 'https://api.github.com' && 'git.froth.zone' || 'ghcr.io' }}
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
   docker:
     runs-on: ubuntu-latest
+    container:
+      image: catthehacker/ubuntu:act-latest
     permissions:
       contents: read
       packages: write