diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5b2bb977..8dd5c2dc 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1652,6 +1652,7 @@ packages:
         - machines-directory
         - machines-io
         - machines-process
+        - sarsi
         # on behalf of Bryan O'Sullivan @bos:
         - wreq