diff --git a/build-constraints.yaml b/build-constraints.yaml
index 033798ab..da51ffdf 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -910,6 +910,9 @@ packages:
         # https://github.com/mgajda/json-autotype/issues/5
         - json-autotype < 0.4
 
+        # https://github.com/fpco/stackage/issues/529
+        - fixed-vector < 0.8
+
 # Package flags are applied to individual packages, and override the values of
 # global-flags
 package-flags: