diff --git a/agent.codefly.yaml b/agent.codefly.yaml
index 2119ebf..dcafebc 100644
--- a/agent.codefly.yaml
+++ b/agent.codefly.yaml
@@ -2,6 +2,9 @@ publisher: codefly.dev
 kind: codefly:service
 name: temporal
 version: 0.0.18
+source:
+  directory: .
+  agent: codefly.dev/go:0.0.56
 release:
   owner: workflow
   workflow: releaser.yml
diff --git a/release_test.go b/release_test.go
index d15f99c..0665b7e 100644
--- a/release_test.go
+++ b/release_test.go
@@ -20,8 +20,12 @@ func TestReleaseDeclaresOnePublisherAndArchiveSBOMs(t *testing.T) {
 	}
 	var manifest struct {
 		Release struct{ Owner, Workflow string }
+		Source  struct{ Directory, Agent string }
 	}
 	read("agent.codefly.yaml", &manifest)
+	if manifest.Source.Directory != "." || manifest.Source.Agent == "" {
+		t.Fatal("publication must select a source packager even when several compatible agents are installed")
+	}
 	if manifest.Release.Owner != "workflow" || manifest.Release.Workflow != "releaser.yml" {
 		t.Fatal("the tag workflow must be the sole artifact publisher")
 	}