diff --git a/build-constraints.yaml b/build-constraints.yaml
index 0cc0fdc7..0c8204e0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3401,6 +3401,7 @@ packages:
         - pomaps < 0 # GHC 8.4 via base-4.11.0.0
 
     "Alexey Kotlyarov <akotlyarov@seek.com.au> @koterpillar":
+        - appendmap
         - serverless-haskell
 
     "Guru Devanla <grdvnl@gmail.com> @gdevanla":