diff --git a/build-constraints.yaml b/build-constraints.yaml
index e074869a..e1aaaf43 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1790,6 +1790,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/992
         - safecopy < 0.9
+
+        # https://github.com/fpco/stackage/issues/1042
+        - clock < 0.6
 # end of packages