diff --git a/build-constraints.yaml b/build-constraints.yaml
index de52b789..8801ca2d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3233,7 +3233,7 @@ packages:
         - postgres-options
         - tmp-postgres
         - pg-transact
-        - hspec-pg-transact
+        - hspec-pg-transact < 0 # compilation failure (against tmp-postgres?)
         - postgresql-simple-queue
         - port-utils