diff --git a/build-constraints.yaml b/build-constraints.yaml
index 76d6228d..e6df4603 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2776,8 +2776,8 @@ packages:
     "Lennart Spitzner <hexagoxel@hexagoxel.de> @lspitzner":
         - multistate < 0 # GHC 8.4 via base-4.11.0.0
         - pqueue
-        - butcher # 0 # GHC 8.4 via base-4.11.0.0
-        - czipwith # 0 # GHC 8.4 via template-haskell-2.13.0.0
+        - butcher
+        - czipwith
         - brittany < 0 # GHC 8.4 via ghc-8.4.1
 
     "Ryan Mulligan <ryan@ryantm.com> @ryantm":