diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1a40e883..79035d09 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -40,6 +40,7 @@ packages:
         - arrowp-qq
         - clr-marshal
         - clr-host
+        - haskell-src-exts-util
         - hexml-lens
         - hp2pretty
         - floatshow