diff --git a/build-constraints.yaml b/build-constraints.yaml
index e118ca77..3cfb0da8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4196,7 +4196,8 @@ skipped-tests:
     - snappy # https://github.com/bos/snappy/issues/1
     - thyme # https://github.com/commercialhaskell/stackage/issues/4003
     - genvalidity-time # https://github.com/NorfairKing/validity/issues/51
-    - uri-bytestring
+    - uri-bytestring # Could not deduce (SOP.All (SOP.All Arbitrary) xs) arising from a use of ‘SOP.hcpure’
+    - cron # Could not deduce (SOP.All (SOP.All Arbitrary) xss) arising from a use of ‘SOP.hcpure’
 
     # Runtime issues
     - blank-canvas # Never finishes https://github.com/ku-fpg/blank-canvas/issues/73