diff --git a/build-constraints.yaml b/build-constraints.yaml
index d85b29b5..1188510d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1319,6 +1319,7 @@ packages:
         - bytestring-read
         - memcached-binary
         - barrier
+        - haddocset
 
     "Kai Zhang <kai@kzhang.org> @kaizhang":
         - clustering