diff --git a/build-constraints.yaml b/build-constraints.yaml
index 743dd27f..932fc435 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1234,6 +1234,9 @@ packages:
         - warp < 3.1
         - warp-tls < 3.1
 
+        # https://github.com/fpco/stackage/issues/706
+        - extra < 1.4
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: