diff --git a/.cloudbuild/build.yaml b/.cloudbuild/build.yaml
index a58ea26..0228861 100644
--- a/.cloudbuild/build.yaml
+++ b/.cloudbuild/build.yaml
@@ -29,6 +29,11 @@ availableSecrets:
     - versionName: projects/$PROJECT_ID/secrets/alpine-cli-ghcr-token/versions/latest
       env: 'GH_PAT'
 
+substitutions:
+  _IMAGE_NAME: 'alpine-cli'
+  _BRANCH: '3'
+  _REGISTRY_USER: 'jswank'
+
 options:
   logging: CLOUD_LOGGING_ONLY
   substitutionOption: 'ALLOW_LOOSE'