diff --git a/build-constraints.yaml b/build-constraints.yaml
index 28ccef98..a67b5c57 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1221,6 +1221,7 @@ packages:
         - web-routing
         - bytestring-read
         - memcached-binary
+        - barrier
 
     "Kai Zhang <kai@kzhang.org> @kaizhang":
         - clustering