diff --git a/layers/dev-haskell.nix b/layers/dev-haskell.nix
index 197570a889f8184fda28a9b05b3e3c1a4d00ac6e..d108b1aa3a9c6baab0226411ee83bbcdd021bce0 100644
--- a/layers/dev-haskell.nix
+++ b/layers/dev-haskell.nix
@@ -3,9 +3,9 @@
 {
   environment.systemPackages = with pkgs; [
     stack
-    haskell-ide-engine
-    ormolu
+    haskell-language-server
     haskellPackages.hoogle
     ghcid
+    haskellPackages.threadscope
   ];
 }