diff --git a/build-constraints.yaml b/build-constraints.yaml
index 36dbadd7..0d22a851 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2428,7 +2428,7 @@ packages:
         - servant-static-th
         - termonad < 0 # via gi-vte
         - world-peace
-        - xml-html-qq
+        - xml-html-qq < 0 # via heterocephalus
         - xml-indexed-cursor
 
     "Franklin Chen <franklinchen@franklinchen.com> @FranklinChen":