diff --git a/build-constraints.yaml b/build-constraints.yaml
index 2449e8d3..acc6c1d6 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7901,6 +7901,7 @@ packages:
 
         # https://github.com/commercialhaskell/stackage/issues/8092
         - mmark < 0.1
+        - mmark-ext < 0.3
 
         # https://github.com/commercialhaskell/stackage/issues/8093
         - string-interpolate < 1.0
@@ -7912,7 +7913,7 @@ packages:
         - strict-mutable-base < 2
 
         # https://github.com/commercialhaskell/stackage/issues/8096
-        - hOpenPGP < 3.4 
+        - hOpenPGP < 3.4
     # end of Stackage upper bounds
 # end of packages