diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1f7c702f..6bdba7ce 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2694,6 +2694,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2108
         - pipes < 4.3.0
         - pipes-safe < 2.2.5
+
+        # https://github.com/fpco/stackage/issues/2127
+        - leapseconds-announced < 2017.0.0.1
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of