diff --git a/build-constraints.yaml b/build-constraints.yaml
index c035e844..0e51d709 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3226,7 +3226,7 @@ packages:
         # - alerta # servant-client 0.12
 
     "Steven Vandevelde <icid.asset@gmail.com> @icidasset":
-        - shikensu
+        - shikensu < 0 # GHC 8.4 via flow
 
     "George Pollard <porges@porg.es> @Porges":
         - email-validate