diff --git a/build-constraints.yaml b/build-constraints.yaml
index 140316d4..0832c28f 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7858,6 +7858,9 @@ packages:
 
         # https://github.com/commercialhaskell/stackage/issues/7987
         - pqueue < 1.7
+
+        # https://github.com/commercialhaskell/stackage/issues/7993
+        - isocline < 1.1.0
     # end of Stackage upper bounds
 # end of packages