diff --git a/build-constraints.yaml b/build-constraints.yaml
index 4e2548ad..def45df5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3872,9 +3872,6 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/4221
         - alsa-mixer < 0.3
 
-        # https://github.com/commercialhaskell/stackage/issues/4229
-        - unix-time < 0.4.0
-
         # https://github.com/commercialhaskell/stackage/issues/4234
         - recursion-schemes < 5.1