diff --git a/build-constraints.yaml b/build-constraints.yaml
index ce606db2..e1ebd1df 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -757,9 +757,9 @@ packages:
         - list-t
         - mtl-prelude
         - neat-interpolation
-        # GHC 8 - partial-handler
+        - partial-handler
         # GHC 8 - postgresql-binary
-        # GHC 8 - slave-thread
+        - slave-thread
         - stm-containers
 
     "Iustin Pop <iustin@k1024.org>":