diff --git a/build-constraints.yaml b/build-constraints.yaml
index 67a1e589..5c87d1be 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3235,6 +3235,9 @@ packages:
 
     "Jack Kiefer <jack.c.kiefer@gmail.com> @JackKiefer":
         - herms
+        
+    "Sergey Vinokurov <serg.foo@gmail.com> @sergv":
+        - sexp-grammar
 
     # If you stop maintaining a package you can move it here.
     # It will then be disabled if it starts causing problems.