diff --git a/build-constraints.yaml b/build-constraints.yaml
index 3932a4d8..a9cb3812 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2663,6 +2663,9 @@ packages:
 
         # https://github.com/haskell/vector/issues/142
         - primitive < 0.6.2.0
+
+        # https://github.com/fpco/stackage/issues/2099
+        - websockets < 0.10.0.0
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of