diff --git a/build-constraints.yaml b/build-constraints.yaml
index e3f31f15..c34b2671 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7827,6 +7827,9 @@ packages:
 
         # https://github.com/commercialhaskell/stackage/issues/7788
         - sbv < 12.0
+
+        # https://github.com/commercialhaskell/stackage/issues/7793
+        - fixed-vector < 2
     # end of Stackage upper bounds
 # end of packages