diff --git a/pkgs/top-level/release-haskell.nix b/pkgs/top-level/release-haskell.nix
index 6a60de224ade..afaa94a23a32 100644
--- a/pkgs/top-level/release-haskell.nix
+++ b/pkgs/top-level/release-haskell.nix
@@ -333,6 +333,7 @@ let
         nota
         nvfetcher
         ormolu
+        pakcs
         pandoc
         petrinizer
         place-cursor-at