diff --git a/build-constraints.yaml b/build-constraints.yaml
index c7d60344..e52c42c9 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1097,8 +1097,7 @@ packages:
         - memcached-binary
 
     "Kai Zhang <kai@kzhang.org> @kaizhang":
-        # https://github.com/kaizhang/clustering/issues/1
-        # - clustering
+        - clustering
         - matrices
 
     "Stackage upper bounds":