diff --git a/build-constraints.yaml b/build-constraints.yaml
index f23f511c..8895f913 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -42,6 +42,8 @@ packages:
         - repa-algorithms
         - repa-devil
         - JuicyPixels-repa
+        - cereal-conduit
+        - binary-conduit
 
     "FP Complete michael@fpcomplete.com @snoyberg":
         - alex