diff --git a/build-constraints.yaml b/build-constraints.yaml
index ed29fbf8..faf54673 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3986,6 +3986,7 @@ packages:
         - servant-auth-wordpress < 0 # via servant-server
         - ca-province-codes
         - mx-state-codes
+        - sitemap-gen
 
     "David Baynard <haskell@baynard.dev> @dbaynard":
         - time-qq < 0 # see christian-marie/time-qq#3