diff --git a/build-constraints.yaml b/build-constraints.yaml
index 327743df..8a0ab990 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -586,6 +586,7 @@ packages:
         - depq
         - matrix-market-attoparsec
         - splitmix-distributions
+        - rp-tree
         - xeno
         - bytestring-mmap # required by xeno
         - datasets < 0 # via req