diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5bcf4934..b91100f4 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7877,6 +7877,10 @@ packages:
         - crypton-x509-validation < 1.8.0
         - quic < 0.2.22
         - tls < 2.2.0
+
+        # https://github.com/commercialhaskell/stackage/issues/7930
+        - happy < 2.2
+        - happy-lib < 2.2
     # end of Stackage upper bounds
 # end of packages