diff --git a/build-constraints.yaml b/build-constraints.yaml
index 9eb35535..66960bf2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -350,8 +350,8 @@ packages:
         - base-compat
 
     "Mario Blazevic <blamario@yahoo.com> @blamario":
-        # GHC 8 - monad-parallel
-        # GHC 8 - monad-coroutine
+        - monad-parallel
+        - monad-coroutine
         - incremental-parser
         - monoid-subclasses
         - picoparsec