diff --git a/build-constraints.yaml b/build-constraints.yaml
index 88d1e316..11ce45d1 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1768,6 +1768,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/992
         - safecopy < 0.9
+
+        # https://github.com/fpco/stackage/issues/1027
+        - stm-conduit < 2.7
 # end of packages