diff --git a/build-constraints.yaml b/build-constraints.yaml
index e1339804..417ac662 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1765,6 +1765,7 @@ packages:
     "Dennis Gosnell <cdep.illabout@gmail.com> @cdepillabout":
         - emailaddress
         - envelope
+        - from-sum
         # - hailgun # BLOCKED http-client 0.5
         # GHC 8 - ig
         - natural-transformation