diff --git a/build-constraints.yaml b/build-constraints.yaml
index 126457b8..46596aab 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2885,6 +2885,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2340
         - language-c < 0.6
 
+        # https://github.com/fpco/stackage/issues/2345
+        - syb < 0.7
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of