diff --git a/postgresql.yaml b/postgresql.yaml
index b2cf4f9..a194298 100644
--- a/postgresql.yaml
+++ b/postgresql.yaml
@@ -48,3 +48,7 @@ data:
         buildorder: 1
         rationale: 'Build dependency (for postgresql-contrib).'
         ref: f26
+      postgresql:
+        buildorder: 2
+        rationale: 'The API we want to provide.'
+        ref: f26