diff --git a/build-constraints.yaml b/build-constraints.yaml
index 35e051ee..83604eaa 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -140,6 +140,7 @@ packages:
         - hs-captcha
         - hackage-security-HTTP
         - hslogger
+        - union-find-array
 
         # Some "grandfathered dependencies" I took over because I contributed to them at some time.
         # Feel free to snatch them from me!