diff --git a/build-constraints.yaml b/build-constraints.yaml
index d202a71c..fb60e7f0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1728,6 +1728,10 @@ packages:
     "Callum Rogers @CRogers":
         - should-not-typecheck
 
+    "Mihaly Barasz klao@nilcons.com @klao":
+        - tz
+        - tzdata
+
     "Stackage upper bounds":
         # https://github.com/fpco/stackage/issues/537
         - zlib < 0.6