diff --git a/build-constraints.yaml b/build-constraints.yaml
index d2ea6510..294156cb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1398,6 +1398,9 @@ packages:
         # https://github.com/fpco/stackage/issues/768
         - HUnit < 1.3
 
+        # https://github.com/fpco/stackage/issues/797
+        - pcre-heavy < 1
+
         # https://github.com/fpco/stackage/issues/798
         - hpc-coveralls < 1