diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5b05edb5..462cd286 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1693,6 +1693,10 @@ packages:
     "Yorick Laupa yo.eight@gmail.com @YoEight":
         - eventstore
 
+    "Sebastian Dröge slomo@coaxion.net @sdroege":
+        - conduit-iconv
+        - conduit-connection
+
     "Stackage upper bounds":
         # https://github.com/fpco/stackage/issues/537
         - zlib < 0.6