diff --git a/build-constraints.yaml b/build-constraints.yaml
index 13638a71..d97900b6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3137,7 +3137,7 @@ packages:
 
     "Alexey Kotlyarov <akotlyarov@seek.com.au> @koterpillar":
         - serverless-haskell
-     
+
     "Guru Devanla <grdvnl@gmail.com> @gdevanla":
         - pptable
         - cassava-records
@@ -3147,6 +3147,9 @@ packages:
         - snap
         - heist
 
+    "Tim Humphries <tim+stackage@utf8.me> @thumphries":
+        - transformers-either
+
     # If you stop maintaining a package you can move it here.
     # It will then be disabled if it starts causing problems.
     # See https://github.com/fpco/stackage/issues/1056