diff --git a/build-constraints.yaml b/build-constraints.yaml
index c3b511498..b1ae4466f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8289,6 +8289,8 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/7124
         - mpi-hs < 0.7.3
 
+        # https://github.com/commercialhaskell/stackage/issues/7129
+        - lpeg < 1.1
     # end of Stackage upper bounds
 # end of packages