diff --git a/build-constraints.yaml b/build-constraints.yaml
index 476fe63d..10fef358 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1176,8 +1176,6 @@ packages:
         # https://github.com/fpco/stackage/issues/590
         - bifunctors < 5
         - profunctors < 5
-        - machines < 0.5
-        - free < 4.12
 
         # https://github.com/fpco/stackage/issues/602
         - errors < 2