diff --git a/build-constraints.yaml b/build-constraints.yaml
index 5f0194fc..cdaeee9a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3233,7 +3233,9 @@ packages:
 
     "Chris Dornan <chris@chrisdornan.com> @cdornan":
         - sort
+        - regex
         - regex-pcre-text
+        - regex-with-pcre
 
     "Elliot Cameron <eacameron@gmail.com> @3noch":
         []
@@ -3901,6 +3903,9 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/4229
         - unix-time < 0.4.0
 
+        # https://github.com/commercialhaskell/stackage/issues/4234
+        - recursion-schemes < 5.1
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of